25692240 has 160 divisors (see below), whose sum is σ = 93494016. Its totient is φ = 5713920.

The previous prime is 25692239. The next prime is 25692241. The reversal of 25692240 is 4229652.

It is an interprime number because it is at equal distance from previous prime (25692239) and next prime (25692241).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25692198 and 25692207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25692241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68694 + ... + 69066.

Almost surely, 2^25692240 is an apocalyptic number.

25692240 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 25692240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46747008).

25692240 is an abundant number, since it is smaller than the sum of its proper divisors (67801776).

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

25692240 is a wasteful number, since it uses less digits than its factorization.

25692240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25692240 is about 5068.7513255239. The cubic root of 25692240 is about 295.0760696291.

The spelling of 25692240 in words is "twenty-five million, six hundred ninety-two thousand, two hundred forty".