2617978 has 16 divisors (see below), whose sum is σ = 4322304. Its totient is φ = 1179360.

The previous prime is 2617961. The next prime is 2617987. The reversal of 2617978 is 8797162.

It is a self number, because there is not a number n which added to its sum of digits gives 2617978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2326 + ... + 3262.

It is an arithmetic number, because the mean of its divisors is an integer number (270144).

2^2617978 is an apocalyptic number.

2617978 is a deficient number, since it is larger than the sum of its proper divisors (1704326).

2617978 is a wasteful number, since it uses less digits than its factorization.

2617978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077.

The product of its digits is 42336, while the sum is 40.

The square root of 2617978 is about 1618.0166871822. The cubic root of 2617978 is about 137.8230947492.

The spelling of 2617978 in words is "two million, six hundred seventeen thousand, nine hundred seventy-eight".