918225642 has 32 divisors (see below), whose sum is σ = 1978122240. Its totient is φ = 283322160.

The previous prime is 918225629. The next prime is 918225653. The reversal of 918225642 is 246522819.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 918225642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103042 + ... + 111597.

It is an arithmetic number, because the mean of its divisors is an integer number (61816320).

Almost surely, 2^918225642 is an apocalyptic number.

918225642 is an abundant number, since it is smaller than the sum of its proper divisors (1059896598).

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

918225642 is a wasteful number, since it uses less digits than its factorization.

918225642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214698.

The product of its digits is 69120, while the sum is 39.

The square root of 918225642 is about 30302.2382341635. The cubic root of 918225642 is about 971.9631626711.

The spelling of 918225642 in words is "nine hundred eighteen million, two hundred twenty-five thousand, six hundred forty-two".