388087028 has 12 divisors (see below), whose sum is σ = 776174112. Its totient is φ = 166323000.

The previous prime is 388087013. The next prime is 388087031. The reversal of 388087028 is 820780883.

388087028 is an admirable number.

It is a super-2 number, since 2×388087028² = 301223082603745568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388087028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6930098 + ... + 6930153.

It is an arithmetic number, because the mean of its divisors is an integer number (64681176).

Almost surely, 2^388087028 is an apocalyptic number.

It is an amenable number.

388087028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

388087028 is a wasteful number, since it uses less digits than its factorization.

388087028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860262 (or 13860260 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 388087028 is about 19699.9245683835. The cubic root of 388087028 is about 729.4178307125.

The spelling of 388087028 in words is "three hundred eighty-eight million, eighty-seven thousand, twenty-eight".