38406388 has 12 divisors (see below), whose sum is σ = 67311972. Its totient is φ = 19174400.

The previous prime is 38406377. The next prime is 38406409. The reversal of 38406388 is 88360483.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 23444964 = 3868^2 + 4842^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38406388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045 + ... + 9652.

It is an arithmetic number, because the mean of its divisors is an integer number (5609331).

Almost surely, 2^38406388 is an apocalyptic number.

It is an amenable number.

38406388 is a deficient number, since it is larger than the sum of its proper divisors (28905584).

38406388 is a wasteful number, since it uses less digits than its factorization.

38406388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14402 (or 14400 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 38406388 is about 6197.2887620313. The cubic root of 38406388 is about 337.3917728885.

The spelling of 38406388 in words is "thirty-eight million, four hundred six thousand, three hundred eighty-eight".