626163940 has 24 divisors (see below), whose sum is σ = 1360288440. Its totient is φ = 241828608.

The previous prime is 626163899. The next prime is 626163949. The reversal of 626163940 is 49361626.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 763876 + 625400064 = 874^2 + 25008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 626163940.

It is not an unprimeable number, because it can be changed into a prime (626163949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539217 + ... + 540376.

It is an arithmetic number, because the mean of its divisors is an integer number (56678685).

Almost surely, 2^626163940 is an apocalyptic number.

It is an amenable number.

626163940 is an abundant number, since it is smaller than the sum of its proper divisors (734124500).

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

626163940 is a wasteful number, since it uses less digits than its factorization.

626163940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079631 (or 1079629 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 626163940 is about 25023.2679720296. The cubic root of 626163940 is about 855.5183933809.

The spelling of 626163940 in words is "six hundred twenty-six million, one hundred sixty-three thousand, nine hundred forty".