388750240 has 48 divisors (see below), whose sum is σ = 919720872. Its totient is φ = 155280384.

The previous prime is 388750213. The next prime is 388750247. The reversal of 388750240 is 42057883.

It can be written as a sum of positive squares in 4 ways, for example, as 388720656 + 29584 = 19716^2 + 172^2 .

It is a super-2 number, since 2×388750240² = 302253498200115200, 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 388750240.

It is not an unprimeable number, because it can be changed into a prime (388750247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158302 + ... + 160738.

Almost surely, 2^388750240 is an apocalyptic number.

It is an amenable number.

388750240 is an abundant number, since it is smaller than the sum of its proper divisors (530970632).

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

388750240 is a wasteful number, since it uses less digits than its factorization.

388750240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449 (or 3441 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 388750240 is about 19716.7502393270. The cubic root of 388750240 is about 729.8331012709.

The spelling of 388750240 in words is "three hundred eighty-eight million, seven hundred fifty thousand, two hundred forty".