25247616 has 64 divisors (see below), whose sum is σ = 68915280. Its totient is φ = 8183808.

The previous prime is 25247591. The next prime is 25247617. The reversal of 25247616 is 61674252.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×25247616² = 1274884227366912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25247617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13320 + ... + 15096.

Almost surely, 2^25247616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25247616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34457640).

25247616 is an abundant number, since it is smaller than the sum of its proper divisors (43667664).

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

25247616 is a wasteful number, since it uses less digits than its factorization.

25247616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831 (or 1819 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 25247616 is about 5024.7005880948. The cubic root of 25247616 is about 293.3639821052.

The spelling of 25247616 in words is "twenty-five million, two hundred forty-seven thousand, six hundred sixteen".