264402489 has 16 divisors (see below), whose sum is σ = 380055872. Its totient is φ = 162537408.

The previous prime is 264402433. The next prime is 264402491. The reversal of 264402489 is 984204462.

It is not a de Polignac number, because 264402489 - 2⁷ = 264402361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264402419) 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, 40779 + ... + 46815.

It is an arithmetic number, because the mean of its divisors is an integer number (23753492).

Almost surely, 2^264402489 is an apocalyptic number.

It is an amenable number.

264402489 is a deficient number, since it is larger than the sum of its proper divisors (115653383).

264402489 is a wasteful number, since it uses less digits than its factorization.

264402489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7176.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 264402489 is about 16260.4578348828. The cubic root of 264402489 is about 641.8327098790.

It can be divided in two parts, 264 and 402489, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 264402489 in words is "two hundred sixty-four million, four hundred two thousand, four hundred eighty-nine".