388932240 has 40 divisors (see below), whose sum is σ = 1205690688. Its totient is φ = 103715200.

The previous prime is 388932227. The next prime is 388932241. The reversal of 388932240 is 42239883.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×388932240² = 302536574622835200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388932241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810036 + ... + 810515.

Almost surely, 2^388932240 is an apocalyptic number.

388932240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388932240 is an abundant number, since it is smaller than the sum of its proper divisors (816758448).

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

388932240 is a wasteful number, since it uses less digits than its factorization.

388932240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620567 (or 1620561 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 388932240 is about 19721.3650643154. The cubic root of 388932240 is about 729.9469780718.

The spelling of 388932240 in words is "three hundred eighty-eight million, nine hundred thirty-two thousand, two hundred forty".