38670440 has 32 divisors (see below), whose sum is σ = 87189480. Its totient is φ = 15436032.

The previous prime is 38670431. The next prime is 38670449. The reversal of 38670440 is 4407683.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38670431) and next prime (38670449).

It can be written as a sum of positive squares in 4 ways, for example, as 20232004 + 18438436 = 4498^2 + 4294^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38670397 and 38670406.

It is not an unprimeable number, because it can be changed into a prime (38670449) 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, 31274 + ... + 32486.

Almost surely, 2^38670440 is an apocalyptic number.

It is an amenable number.

38670440 is an abundant number, since it is smaller than the sum of its proper divisors (48519040).

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

38670440 is a wasteful number, since it uses less digits than its factorization.

38670440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 38670440 is about 6218.5561025048. The cubic root of 38670440 is about 338.1632207721.

The spelling of 38670440 in words is "thirty-eight million, six hundred seventy thousand, four hundred forty".