38870640 has 60 divisors (see below), whose sum is σ = 130542984. Its totient is φ = 10365312.

The previous prime is 38870633. The next prime is 38870641. The reversal of 38870640 is 4607883.

38870640 is a `hidden beast` number, since 3 + 8 + 8 + 7 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38870595 and 38870604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38870641) 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 11 ways as a sum of consecutive naturals, for example, 26274 + ... + 27713.

Almost surely, 2^38870640 is an apocalyptic number.

38870640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38870640 is an abundant number, since it is smaller than the sum of its proper divisors (91672344).

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

38870640 is a wasteful number, since it uses less digits than its factorization.

38870640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54006 (or 53997 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 38870640 is about 6234.6323067203. The cubic root of 38870640 is about 338.7457827300.

The spelling of 38870640 in words is "thirty-eight million, eight hundred seventy thousand, six hundred forty".