2500978 has 8 divisors (see below), whose sum is σ = 3852972. Its totient is φ = 1216656.

The previous prime is 2500973. The next prime is 2500999. The reversal of 2500978 is 8790052.

It can be written as a sum of positive squares in 2 ways, for example, as 2424249 + 76729 = 1557^2 + 277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2500973) 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, 16825 + ... + 16972.

2^2500978 is an apocalyptic number.

2500978 is a deficient number, since it is larger than the sum of its proper divisors (1351994).

2500978 is a wasteful number, since it uses less digits than its factorization.

2500978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33836.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2500978 is about 1581.4480705986. The cubic root of 2500978 is about 135.7385765253.

The spelling of 2500978 in words is "two million, five hundred thousand, nine hundred seventy-eight".