388908051 has 36 divisors (see below), whose sum is σ = 623516616. Its totient is φ = 214986240.

The previous prime is 388908049. The next prime is 388908061. The reversal of 388908051 is 150809883.

It is not a de Polignac number, because 388908051 - 2¹ = 388908049 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 388907994 and 388908012.

It is not an unprimeable number, because it can be changed into a prime (388908061) 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 35 ways as a sum of consecutive naturals, for example, 139891 + ... + 142643.

It is an arithmetic number, because the mean of its divisors is an integer number (17319906).

Almost surely, 2^388908051 is an apocalyptic number.

388908051 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

388908051 is a deficient number, since it is larger than the sum of its proper divisors (234608565).

388908051 is a wasteful number, since it uses less digits than its factorization.

388908051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 388908051 is about 19720.7517858727. The cubic root of 388908051 is about 729.9318451414.

The spelling of 388908051 in words is "three hundred eighty-eight million, nine hundred eight thousand, fifty-one".