25478172 has 48 divisors (see below), whose sum is σ = 69945120. Its totient is φ = 7992576.

The previous prime is 25478171. The next prime is 25478239. The reversal of 25478172 is 27187452.

It is a super-3 number, since 3×25478172³ (a number of 23 digits) contains 333 as substring.

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 (25478171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5103 + ... + 8774.

It is an arithmetic number, because the mean of its divisors is an integer number (1457190).

Almost surely, 2^25478172 is an apocalyptic number.

It is an amenable number.

25478172 is an abundant number, since it is smaller than the sum of its proper divisors (44466948).

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

25478172 is a wasteful number, since it uses less digits than its factorization.

25478172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13907 (or 13899 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 25478172 is about 5047.5907124092. The cubic root of 25478172 is about 294.2542573507.

The spelling of 25478172 in words is "twenty-five million, four hundred seventy-eight thousand, one hundred seventy-two".