38309420 has 12 divisors (see below), whose sum is σ = 80449824. Its totient is φ = 15323760.

The previous prime is 38309417. The next prime is 38309429. The reversal of 38309420 is 2490383.

It is a super-2 number, since 2×38309420² = 2935223321472800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38309429) 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, 957716 + ... + 957755.

It is an arithmetic number, because the mean of its divisors is an integer number (6704152).

Almost surely, 2^38309420 is an apocalyptic number.

It is an amenable number.

38309420 is an abundant number, since it is smaller than the sum of its proper divisors (42140404).

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

38309420 is a wasteful number, since it uses less digits than its factorization.

38309420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915480 (or 1915478 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 38309420 is about 6189.4603965128. The cubic root of 38309420 is about 337.1075859806.

The spelling of 38309420 in words is "thirty-eight million, three hundred nine thousand, four hundred twenty".