264138237 has 12 divisors (see below), whose sum is σ = 416217984. Its totient is φ = 160083720.

The previous prime is 264138223. The next prime is 264138239. The reversal of 264138237 is 732831462.

It is a happy number.

264138237 is a `hidden beast` number, since 2 + 6 + 413 + 8 + 237 = 666.

It is not a de Polignac number, because 264138237 - 2¹⁵ = 264105469 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264138239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1333933 + ... + 1334130.

It is an arithmetic number, because the mean of its divisors is an integer number (34684832).

Almost surely, 2^264138237 is an apocalyptic number.

It is an amenable number.

264138237 is a deficient number, since it is larger than the sum of its proper divisors (152079747).

264138237 is a wasteful number, since it uses less digits than its factorization.

264138237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668080 (or 2668077 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 264138237 is about 16252.3302021587. The cubic root of 264138237 is about 641.6188161390.

Adding to 264138237 its reverse (732831462), we get a palindrome (996969699).

The spelling of 264138237 in words is "two hundred sixty-four million, one hundred thirty-eight thousand, two hundred thirty-seven".