388687420 has 24 divisors (see below), whose sum is σ = 890448048. Its totient is φ = 141340800.

The previous prime is 388687417. The next prime is 388687447. The reversal of 388687420 is 24786883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883161 + ... + 883600.

It is an arithmetic number, because the mean of its divisors is an integer number (37102002).

Almost surely, 2^388687420 is an apocalyptic number.

It is an amenable number.

388687420 is an abundant number, since it is smaller than the sum of its proper divisors (501760628).

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

388687420 is a wasteful number, since it uses less digits than its factorization.

388687420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766781 (or 1766779 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 388687420 is about 19715.1571132467. The cubic root of 388687420 is about 729.7937867526.

The spelling of 388687420 in words is "three hundred eighty-eight million, six hundred eighty-seven thousand, four hundred twenty".