38731420809 has 63 divisors (see below), whose sum is σ = 59986953957. Its totient is φ = 24995555424.

The previous prime is 38731420787. The next prime is 38731420829. The reversal of 38731420809 is 90802413783.

The square root of 38731420809 is 196803.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 30696091209 + 8035329600 = 175203^2 + 89640^2 .

It is not a de Polignac number, because 38731420809 - 2⁷ = 38731420681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38731420829) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 196606099 + ... + 196606295.

Almost surely, 2^38731420809 is an apocalyptic number.

38731420809 is the 196803-rd square number.

38731420809 is the 98402-nd centered octagonal number.

It is an amenable number.

38731420809 is a deficient number, since it is larger than the sum of its proper divisors (21255533148).

38731420809 is an frugal number, since it uses more digits than its factorization.

38731420809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 38731420809 in words is "thirty-eight billion, seven hundred thirty-one million, four hundred twenty thousand, eight hundred nine".