28697492628 has 36 divisors (see below), whose sum is σ = 82903868320. Its totient is φ = 8199283536.

The previous prime is 28697492597. The next prime is 28697492647. The reversal of 28697492628 is 82629479682.

28697492628 is a `hidden beast` number, since 2 + 86 + 9 + 7 + 492 + 62 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×28697492628² (a number of 22 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56939218 + ... + 56939721.

Almost surely, 2^28697492628 is an apocalyptic number.

28697492628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28697492628 is an abundant number, since it is smaller than the sum of its proper divisors (54206375692).

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

28697492628 is a wasteful number, since it uses less digits than its factorization.

28697492628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113878956 (or 113878951 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 28697492628 in words is "twenty-eight billion, six hundred ninety-seven million, four hundred ninety-two thousand, six hundred twenty-eight".