38997231 has 32 divisors (see below), whose sum is σ = 64393728. Its totient is φ = 20442240.

The previous prime is 38997229. The next prime is 38997293. The reversal of 38997231 is 13279983.

It is not a de Polignac number, because 38997231 - 2¹ = 38997229 is a prime.

It is a super-2 number, since 2×38997231² = 3041568051334722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38997131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57265 + ... + 57941.

It is an arithmetic number, because the mean of its divisors is an integer number (2012304).

Almost surely, 2^38997231 is an apocalyptic number.

38997231 is a deficient number, since it is larger than the sum of its proper divisors (25396497).

38997231 is a wasteful number, since it uses less digits than its factorization.

38997231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its digits is 81648, while the sum is 42.

The square root of 38997231 is about 6244.7762970342. The cubic root of 38997231 is about 339.1131182444.

The spelling of 38997231 in words is "thirty-eight million, nine hundred ninety-seven thousand, two hundred thirty-one".