28659551970 has 64 divisors (see below), whose sum is σ = 79182925056. Its totient is φ = 6502932480.

The previous prime is 28659551957. The next prime is 28659552001. The reversal of 28659551970 is 7915595682.

It is a happy number.

It is a super-2 number, since 2×28659551970² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28659551970.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469311 + ... + 526850.

It is an arithmetic number, because the mean of its divisors is an integer number (1237233204).

Almost surely, 2^28659551970 is an apocalyptic number.

28659551970 is an abundant number, since it is smaller than the sum of its proper divisors (50523373086).

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

28659551970 is a wasteful number, since it uses less digits than its factorization.

28659551970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996315.

The product of its (nonzero) digits is 6804000, while the sum is 57.

The spelling of 28659551970 in words is "twenty-eight billion, six hundred fifty-nine million, five hundred fifty-one thousand, nine hundred seventy".