28658356400 has 30 divisors (see below), whose sum is σ = 68851702212. Its totient is φ = 11463342400.

The previous prime is 28658356303. The next prime is 28658356411. The reversal of 28658356400 is 465385682.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35822546 + ... + 35823345.

Almost surely, 2^28658356400 is an apocalyptic number.

28658356400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28658356400 is an abundant number, since it is smaller than the sum of its proper divisors (40193345812).

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

28658356400 is a wasteful number, since it uses less digits than its factorization.

28658356400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71645909 (or 71645898 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 47.

The spelling of 28658356400 in words is "twenty-eight billion, six hundred fifty-eight million, three hundred fifty-six thousand, four hundred".