25523740 has 72 divisors (see below), whose sum is σ = 60328800. Its totient is φ = 9060480.

The previous prime is 25523737. The next prime is 25523753. The reversal of 25523740 is 4732552.

25523740 = T₂₃₁ + T₂₃₂ + ... + T₅₄₈.

It is a super-2 number, since 2×25523740² = 1302922607175200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25523699 and 25523708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128161 + ... + 128359.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^25523740 is an apocalyptic number.

25523740 is a gapful number since it is divisible by the number (20) 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 25523740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30164400).

25523740 is an abundant number, since it is smaller than the sum of its proper divisors (34805060).

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

25523740 is a wasteful number, since it uses less digits than its factorization.

25523740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 25523740 is about 5052.1025326096. The cubic root of 25523740 is about 294.4295785646.

The spelling of 25523740 in words is "twenty-five million, five hundred twenty-three thousand, seven hundred forty".