25438764 has 48 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 7775040.

The previous prime is 25438741. The next prime is 25438789. The reversal of 25438764 is 46783452.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27469 + ... + 28379.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^25438764 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 25438764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

25438764 is an abundant number, since it is smaller than the sum of its proper divisors (38911956).

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

25438764 is a wasteful number, since it uses less digits than its factorization.

25438764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1108 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 25438764 is about 5043.6855572091. The cubic root of 25438764 is about 294.1024678692.

The spelling of 25438764 in words is "twenty-five million, four hundred thirty-eight thousand, seven hundred sixty-four".