264840442 has 4 divisors (see below), whose sum is σ = 397260666. Its totient is φ = 132420220.

The previous prime is 264840427. The next prime is 264840479. The reversal of 264840442 is 244048462.

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., 218477961 + 46362481 = 14781^2 + 6809^2 .

It is a junction number, because it is equal to n+sod(n) for n = 264840398 and 264840407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66210109 + ... + 66210112.

Almost surely, 2^264840442 is an apocalyptic number.

264840442 is a deficient number, since it is larger than the sum of its proper divisors (132420224).

264840442 is a wasteful number, since it uses less digits than its factorization.

264840442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132420223.

The product of its (nonzero) digits is 49152, while the sum is 34.

The square root of 264840442 is about 16273.9190731673. The cubic root of 264840442 is about 642.1868889755.

The spelling of 264840442 in words is "two hundred sixty-four million, eight hundred forty thousand, four hundred forty-two".