78327389700 has 432 divisors, whose sum is σ = 284710666240. Its totient is φ = 17642499840.

The previous prime is 78327389677. The next prime is 78327389731. The reversal of 78327389700 is 798372387.

It is a super-2 number, since 2×78327389700² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 178422081 + ... + 178422519.

Almost surely, 2^78327389700 is an apocalyptic number.

78327389700 is a gapful number since it is divisible by the number (70) 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 78327389700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142355333120).

78327389700 is an abundant number, since it is smaller than the sum of its proper divisors (206383276540).

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

78327389700 is a wasteful number, since it uses less digits than its factorization.

78327389700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The spelling of 78327389700 in words is "seventy-eight billion, three hundred twenty-seven million, three hundred eighty-nine thousand, seven hundred".