25554492 has 18 divisors (see below), whose sum is σ = 64596168. Its totient is φ = 8518152.

The previous prime is 25554491. The next prime is 25554497. The reversal of 25554492 is 29445552.

25554492 is a `hidden beast` number, since 25 + 5 + 544 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×25554492² = 1306064122756128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 709847 = 25554492 / (2 + 5 + 5 + 5 + 4 + 4 + 9 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25554491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354888 + ... + 354959.

It is an arithmetic number, because the mean of its divisors is an integer number (3588676).

Almost surely, 2^25554492 is an apocalyptic number.

It is an amenable number.

25554492 is an abundant number, since it is smaller than the sum of its proper divisors (39041676).

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

25554492 is a wasteful number, since it uses less digits than its factorization.

25554492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709857 (or 709852 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 25554492 is about 5055.1451017750. The cubic root of 25554492 is about 294.5477778634.

The spelling of 25554492 in words is "twenty-five million, five hundred fifty-four thousand, four hundred ninety-two".