253279664 has 20 divisors (see below), whose sum is σ = 535341480. Its totient is φ = 115127040.

The previous prime is 253279627. The next prime is 253279667. The reversal of 253279664 is 466972352.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (253279667) 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, 719369 + ... + 719720.

It is an arithmetic number, because the mean of its divisors is an integer number (26767074).

Almost surely, 2^253279664 is an apocalyptic number.

It is an amenable number.

253279664 is an abundant number, since it is smaller than the sum of its proper divisors (282061816).

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

253279664 is a wasteful number, since it uses less digits than its factorization.

253279664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439108 (or 1439102 counting only the distinct ones).

The product of its digits is 544320, while the sum is 44.

The square root of 253279664 is about 15914.7624550290. The cubic root of 253279664 is about 632.7033109367.

The spelling of 253279664 in words is "two hundred fifty-three million, two hundred seventy-nine thousand, six hundred sixty-four".