38620690 has 16 divisors (see below), whose sum is σ = 69591960. Its totient is φ = 15431680.

The previous prime is 38620679. The next prime is 38620691. The reversal of 38620690 is 9602683.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14737921 + 23882769 = 3839^2 + 4887^2 .

It is a super-2 number, since 2×38620690² = 2983115392152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38620691) by changing a digit.

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, 12720 + ... + 15460.

Almost surely, 2^38620690 is an apocalyptic number.

38620690 is a deficient number, since it is larger than the sum of its proper divisors (30971270).

38620690 is a wasteful number, since it uses less digits than its factorization.

38620690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 38620690 is about 6214.5546904022. The cubic root of 38620690 is about 338.0181414816.

The spelling of 38620690 in words is "thirty-eight million, six hundred twenty thousand, six hundred ninety".