38670438 has 16 divisors (see below), whose sum is σ = 77439600. Its totient is φ = 12873696.

The previous prime is 38670431. The next prime is 38670449. The reversal of 38670438 is 83407683.

It is a super-2 number, since 2×38670438² = 2990805550223688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38670396 and 38670405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38670431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1588 + ... + 8936.

It is an arithmetic number, because the mean of its divisors is an integer number (4839975).

Almost surely, 2^38670438 is an apocalyptic number.

38670438 is an abundant number, since it is smaller than the sum of its proper divisors (38769162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38670438 is a wasteful number, since it uses less digits than its factorization.

38670438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8231.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 38670438 is about 6218.5559416958. Note that the first 3 decimals coincide. The cubic root of 38670438 is about 338.1632149422.

The spelling of 38670438 in words is "thirty-eight million, six hundred seventy thousand, four hundred thirty-eight".