25187320 has 16 divisors (see below), whose sum is σ = 56671560. Its totient is φ = 10074912.

The previous prime is 25187317. The next prime is 25187329. The reversal of 25187320 is 2378152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25187329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314802 + ... + 314881.

Almost surely, 2^25187320 is an apocalyptic number.

25187320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25187320 is an abundant number, since it is smaller than the sum of its proper divisors (31484240).

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

25187320 is a wasteful number, since it uses less digits than its factorization.

25187320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629694 (or 629690 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25187320 is about 5018.6970420618. The cubic root of 25187320 is about 293.1302600426.

It can be divided in two parts, 251 and 87320, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 25187320 in words is "twenty-five million, one hundred eighty-seven thousand, three hundred twenty".