38872309 has 16 divisors (see below), whose sum is σ = 46958080. Its totient is φ = 31434480.

The previous prime is 38872307. The next prime is 38872367. The reversal of 38872309 is 90327883.

It is a happy number.

It is not a de Polignac number, because 38872309 - 2¹ = 38872307 is a prime.

It is a super-2 number, since 2×38872309² = 3022112813982962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38872307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43582 + ... + 44464.

It is an arithmetic number, because the mean of its divisors is an integer number (2934880).

Almost surely, 2^38872309 is an apocalyptic number.

It is an amenable number.

38872309 is a deficient number, since it is larger than the sum of its proper divisors (8085771).

38872309 is a wasteful number, since it uses less digits than its factorization.

38872309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 38872309 is about 6234.7661543958. The cubic root of 38872309 is about 338.7506309361.

The spelling of 38872309 in words is "thirty-eight million, eight hundred seventy-two thousand, three hundred nine".