25428156 has 96 divisors (see below), whose sum is σ = 70371840. Its totient is φ = 7070976.

The previous prime is 25428097. The next prime is 25428167. The reversal of 25428156 is 65182452.

It is a super-2 number, since 2×25428156² = 1293182235120672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67986 + ... + 68358.

It is an arithmetic number, because the mean of its divisors is an integer number (733040).

Almost surely, 2^25428156 is an apocalyptic number.

25428156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25428156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35185920).

25428156 is an abundant number, since it is smaller than the sum of its proper divisors (44943684).

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

25428156 is a wasteful number, since it uses less digits than its factorization.

25428156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 433 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 25428156 is about 5042.6338356062. The cubic root of 25428156 is about 294.0615818060.

The spelling of 25428156 in words is "twenty-five million, four hundred twenty-eight thousand, one hundred fifty-six".