38621390 has 16 divisors (see below), whose sum is σ = 70208640. Its totient is φ = 15295200.

The previous prime is 38621389. The next prime is 38621431. The reversal of 38621390 is 9312683.

It is a super-2 number, since 2×38621390² = 2983223531064200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18110 + ... + 20129.

It is an arithmetic number, because the mean of its divisors is an integer number (4388040).

Almost surely, 2^38621390 is an apocalyptic number.

38621390 is a deficient number, since it is larger than the sum of its proper divisors (31587250).

38621390 is a wasteful number, since it uses less digits than its factorization.

38621390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38347.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 38621390 is about 6214.6110095484. The cubic root of 38621390 is about 338.0201836622.

The spelling of 38621390 in words is "thirty-eight million, six hundred twenty-one thousand, three hundred ninety".