264171138 has 32 divisors (see below), whose sum is σ = 658713600. Its totient is φ = 68615760.

The previous prime is 264171137. The next prime is 264171163. The reversal of 264171138 is 831171462.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 264171099 and 264171108.

It is not an unprimeable number, because it can be changed into a prime (264171137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285438 + ... + 286361.

It is an arithmetic number, because the mean of its divisors is an integer number (20584800).

Almost surely, 2^264171138 is an apocalyptic number.

264171138 is an abundant number, since it is smaller than the sum of its proper divisors (394542462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

264171138 is a wasteful number, since it uses less digits than its factorization.

264171138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571822.

The product of its digits is 8064, while the sum is 33.

The square root of 264171138 is about 16253.3423639570. The cubic root of 264171138 is about 641.6454549987.

The spelling of 264171138 in words is "two hundred sixty-four million, one hundred seventy-one thousand, one hundred thirty-eight".