25749432 has 48 divisors (see below), whose sum is σ = 71368440. Its totient is φ = 8382528.

The previous prime is 25749431. The next prime is 25749433. The reversal of 25749432 is 23494752.

It is an interprime number because it is at equal distance from previous prime (25749431) and next prime (25749433).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25749431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063 + ... + 7254.

Almost surely, 2^25749432 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 25749432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35684220).

25749432 is an abundant number, since it is smaller than the sum of its proper divisors (45619008).

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

25749432 is a wasteful number, since it uses less digits than its factorization.

25749432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8372 (or 8365 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 25749432 is about 5074.3898155345. The cubic root of 25749432 is about 295.2948579198.

The spelling of 25749432 in words is "twenty-five million, seven hundred forty-nine thousand, four hundred thirty-two".