264862138 has 4 divisors (see below), whose sum is σ = 397293210. Its totient is φ = 132431068.

The previous prime is 264862099. The next prime is 264862139. The reversal of 264862138 is 831268462.

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

It can be written as a sum of positive squares in only one way, i.e., 228826129 + 36036009 = 15127^2 + 6003^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 264862138.

It is not an unprimeable number, because it can be changed into a prime (264862139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66215533 + ... + 66215536.

Almost surely, 2^264862138 is an apocalyptic number.

264862138 is a deficient number, since it is larger than the sum of its proper divisors (132431072).

264862138 is a wasteful number, since it uses less digits than its factorization.

264862138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132431071.

The product of its digits is 110592, while the sum is 40.

The square root of 264862138 is about 16274.5856475672. The cubic root of 264862138 is about 642.2044246990.

The spelling of 264862138 in words is "two hundred sixty-four million, eight hundred sixty-two thousand, one hundred thirty-eight".