264570638 has 4 divisors (see below), whose sum is σ = 396855960. Its totient is φ = 132285318.

The previous prime is 264570601. The next prime is 264570653. The reversal of 264570638 is 836075462.

It is a happy number.

264570638 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836075462 = 2 ⋅418037731.

It is a junction number, because it is equal to n+sod(n) for n = 264570595 and 264570604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66142658 + ... + 66142661.

It is an arithmetic number, because the mean of its divisors is an integer number (99213990).

Almost surely, 2^264570638 is an apocalyptic number.

264570638 is a deficient number, since it is larger than the sum of its proper divisors (132285322).

264570638 is a wasteful number, since it uses less digits than its factorization.

264570638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132285321.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 264570638 is about 16265.6275009604. The cubic root of 264570638 is about 641.9687406939.

The spelling of 264570638 in words is "two hundred sixty-four million, five hundred seventy thousand, six hundred thirty-eight".