38949431 has 4 divisors (see below), whose sum is σ = 41240592. Its totient is φ = 36658272.

The previous prime is 38949401. The next prime is 38949433. The reversal of 38949431 is 13494983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38949431 - 2⁶ = 38949367 is a prime.

It is a super-2 number, since 2×38949431² = 3034116350447522, 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 (38949433) 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, 1145555 + ... + 1145588.

It is an arithmetic number, because the mean of its divisors is an integer number (10310148).

Almost surely, 2^38949431 is an apocalyptic number.

38949431 is a deficient number, since it is larger than the sum of its proper divisors (2291161).

38949431 is a wasteful number, since it uses less digits than its factorization.

38949431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291160.

The product of its digits is 93312, while the sum is 41.

The square root of 38949431 is about 6240.9479247948. The cubic root of 38949431 is about 338.9745081089.

The spelling of 38949431 in words is "thirty-eight million, nine hundred forty-nine thousand, four hundred thirty-one".