914978642 has 18 divisors (see below), whose sum is σ = 1396291887. Its totient is φ = 449682336.

The previous prime is 914978579. The next prime is 914978719. The reversal of 914978642 is 246879419.

It can be written as a sum of positive squares in 5 ways, for example, as 889888561 + 25090081 = 29831^2 + 5009^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=21389.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3122648 + ... + 3122940.

Almost surely, 2^914978642 is an apocalyptic number.

914978642 is a deficient number, since it is larger than the sum of its proper divisors (481313245).

914978642 is an frugal number, since it uses more digits than its factorization.

914978642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 368 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The square root of 914978642 is about 30248.6138855981. The cubic root of 914978642 is about 970.8161346144.

Multiplying 914978642 by its sum of digits (50), we get a square (45748932100 = 213890²).

The spelling of 914978642 in words is "nine hundred fourteen million, nine hundred seventy-eight thousand, six hundred forty-two".