38906690 has 16 divisors (see below), whose sum is σ = 72447480. Its totient is φ = 15025920.

The previous prime is 38906683. The next prime is 38906711. The reversal of 38906690 is 9660983.

It can be written as a sum of positive squares in 4 ways, for example, as 27489049 + 11417641 = 5243^2 + 3379^2 .

It is a super-2 number, since 2×38906690² = 3027461053512200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66791 + ... + 67370.

Almost surely, 2^38906690 is an apocalyptic number.

38906690 is a deficient number, since it is larger than the sum of its proper divisors (33540790).

38906690 is a wasteful number, since it uses less digits than its factorization.

38906690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134197.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 38906690 is about 6237.5227454495. The cubic root of 38906690 is about 338.8504719608.

The spelling of 38906690 in words is "thirty-eight million, nine hundred six thousand, six hundred ninety".