38972291 has 8 divisors (see below), whose sum is σ = 39782400. Its totient is φ = 38169792.

The previous prime is 38972261. The next prime is 38972293. The reversal of 38972291 is 19227983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38972291 - 2¹⁰ = 38971267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38972293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9086 + ... + 12668.

It is an arithmetic number, because the mean of its divisors is an integer number (4972800).

Almost surely, 2^38972291 is an apocalyptic number.

38972291 is a deficient number, since it is larger than the sum of its proper divisors (810109).

38972291 is a wasteful number, since it uses less digits than its factorization.

38972291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805.

The product of its digits is 54432, while the sum is 41.

The square root of 38972291 is about 6242.7791086983. The cubic root of 38972291 is about 339.0408115315.

The spelling of 38972291 in words is "thirty-eight million, nine hundred seventy-two thousand, two hundred ninety-one".