388006402 has 56 divisors (see below), whose sum is σ = 726364044. Its totient is φ = 154893312.

The previous prime is 388006387. The next prime is 388006427. The reversal of 388006402 is 204600883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 382241601 + 5764801 = 19551^2 + 2401^2 .

388006402 is a modest number, since divided by 6402 gives 388 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4000018 + ... + 4000114.

Almost surely, 2^388006402 is an apocalyptic number.

388006402 is a deficient number, since it is larger than the sum of its proper divisors (338357642).

388006402 is an frugal number, since it uses more digits than its factorization.

388006402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 388006402 is about 19697.8781090756. The cubic root of 388006402 is about 729.3673144530.

The spelling of 388006402 in words is "three hundred eighty-eight million, six thousand, four hundred two".