25547980 has 24 divisors (see below), whose sum is σ = 53746560. Its totient is φ = 10200960.

The previous prime is 25547953. The next prime is 25548049. The reversal of 25547980 is 8974552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19176 + ... + 20464.

It is an arithmetic number, because the mean of its divisors is an integer number (2239440).

Almost surely, 2^25547980 is an apocalyptic number.

25547980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25547980 is an abundant number, since it is smaller than the sum of its proper divisors (28198580).

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

25547980 is a wasteful number, since it uses less digits than its factorization.

25547980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25547980 is about 5054.5009644870. The cubic root of 25547980 is about 294.5227560645.

It can be divided in two parts, 2554 and 7980, that multiplied together give a triangular number (20380920 = T₆₃₈₄).

The spelling of 25547980 in words is "twenty-five million, five hundred forty-seven thousand, nine hundred eighty".