28403947558350 has 432 divisors, whose sum is σ = 98683460104320. Its totient is φ = 5799598963200.

The previous prime is 28403947558333. The next prime is 28403947558373. The reversal of 28403947558350 is 5385574930482.

28403947558350 is a `hidden beast` number, since 2 + 8 + 4 + 0 + 3 + 9 + 47 + 5 + 583 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 7287936 + ... + 10484364.

Almost surely, 2^{28403947558350} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28403947558350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49341730052160).

28403947558350 is an abundant number, since it is smaller than the sum of its proper divisors (70279512545970).

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

28403947558350 is a wasteful number, since it uses less digits than its factorization.

28403947558350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3196505 (or 3196490 counting only the distinct ones).

The product of its (nonzero) digits is 145152000, while the sum is 63.

The spelling of 28403947558350 in words is "twenty-eight trillion, four hundred three billion, nine hundred forty-seven million, five hundred fifty-eight thousand, three hundred fifty".