38706820 has 12 divisors (see below), whose sum is σ = 81284364. Its totient is φ = 15482720.

The previous prime is 38706799. The next prime is 38706821. The reversal of 38706820 is 2860783.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18939904 + 19766916 = 4352^2 + 4446^2 .

It is not an unprimeable number, because it can be changed into a prime (38706821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967651 + ... + 967690.

It is an arithmetic number, because the mean of its divisors is an integer number (6773697).

Almost surely, 2^38706820 is an apocalyptic number.

It is an amenable number.

38706820 is an abundant number, since it is smaller than the sum of its proper divisors (42577544).

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

38706820 is a wasteful number, since it uses less digits than its factorization.

38706820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935350 (or 1935348 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 38706820 is about 6221.4805311919. The cubic root of 38706820 is about 338.2692321689.

The spelling of 38706820 in words is "thirty-eight million, seven hundred six thousand, eight hundred twenty".