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28378343328720 = 24357111738876443
BaseRepresentation
bin1100111001111010110010…
…00100101100101111010000
310201110221110112120101111120
412130331121010230233100
512204422321343004340
6140204455252442240
75656160542203630
oct634753104545720
9121427415511446
1028378343328720
119051207a94a30
123223ab5919380
1312ab0b2852a28
1470173a7706c0
153432bc2d34d0
hex19cf5912cbd0

28378343328720 has 320 divisors, whose sum is σ = 110314457708544. Its totient is φ = 5862712412160.

The previous prime is 28378343328707. The next prime is 28378343328787. The reversal of 28378343328720 is 2782334387382.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1241182 + ... + 7635261.

Almost surely, 228378343328720 is an apocalyptic number.

28378343328720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28378343328720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55157228854272).

28378343328720 is an abundant number, since it is smaller than the sum of its proper divisors (81936114379824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28378343328720 is a wasteful number, since it uses less digits than its factorization.

28378343328720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8876650 (or 8876644 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 60.

The spelling of 28378343328720 in words is "twenty-eight trillion, three hundred seventy-eight billion, three hundred forty-three million, three hundred twenty-eight thousand, seven hundred twenty".