38870020 has 24 divisors (see below), whose sum is σ = 93288384. Its totient is φ = 13326816.

The previous prime is 38870003. The next prime is 38870021. The reversal of 38870020 is 2007883.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (38870021) 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, 138682 + ... + 138961.

It is an arithmetic number, because the mean of its divisors is an integer number (3887016).

Almost surely, 2^38870020 is an apocalyptic number.

It is an amenable number.

38870020 is an abundant number, since it is smaller than the sum of its proper divisors (54418364).

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

38870020 is a wasteful number, since it uses less digits than its factorization.

38870020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277659 (or 277657 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 38870020 is about 6234.5825842634. The cubic root of 38870020 is about 338.7439816834.

The spelling of 38870020 in words is "thirty-eight million, eight hundred seventy thousand, twenty".