264400039 has 4 divisors (see below), whose sum is σ = 271546024. Its totient is φ = 257254056.

The previous prime is 264400033. The next prime is 264400049. The reversal of 264400039 is 930004462.

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

It is a cyclic number.

It is not a de Polignac number, because 264400039 - 2⁵ = 264400007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264400033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3572937 + ... + 3573010.

It is an arithmetic number, because the mean of its divisors is an integer number (67886506).

Almost surely, 2^264400039 is an apocalyptic number.

264400039 is a deficient number, since it is larger than the sum of its proper divisors (7145985).

264400039 is an equidigital number, since it uses as much as digits as its factorization.

264400039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145984.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 264400039 is about 16260.3824985761. The cubic root of 264400039 is about 641.8307274279.

The spelling of 264400039 in words is "two hundred sixty-four million, four hundred thousand, thirty-nine".