25319916 has 18 divisors (see below), whose sum is σ = 64003212. Its totient is φ = 8439960.

The previous prime is 25319881. The next prime is 25319927. The reversal of 25319916 is 61991352.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 703331 = 25319916 / (2 + 5 + 3 + 1 + 9 + 9 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 351630 + ... + 351701.

It is an arithmetic number, because the mean of its divisors is an integer number (3555734).

Almost surely, 2^25319916 is an apocalyptic number.

It is an amenable number.

25319916 is an abundant number, since it is smaller than the sum of its proper divisors (38683296).

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

25319916 is a wasteful number, since it uses less digits than its factorization.

25319916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703341 (or 703336 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 25319916 is about 5031.8899034061. The cubic root of 25319916 is about 293.6437445184.

The spelling of 25319916 in words is "twenty-five million, three hundred nineteen thousand, nine hundred sixteen".