25278416 has 10 divisors (see below), whose sum is σ = 48976962. Its totient is φ = 12639200.

The previous prime is 25278389. The next prime is 25278431. The reversal of 25278416 is 61487252.

It can be written as a sum of positive squares in only one way, i.e., 19324816 + 5953600 = 4396^2 + 2440^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789935 + ... + 789966.

Almost surely, 2^25278416 is an apocalyptic number.

It is an amenable number.

25278416 is a deficient number, since it is larger than the sum of its proper divisors (23698546).

25278416 is a wasteful number, since it uses less digits than its factorization.

25278416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579909 (or 1579903 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 25278416 is about 5027.7645131808. The cubic root of 25278416 is about 293.4832268807.

The spelling of 25278416 in words is "twenty-five million, two hundred seventy-eight thousand, four hundred sixteen".