25415780 has 48 divisors (see below), whose sum is σ = 58376640. Its totient is φ = 9237888.

The previous prime is 25415773. The next prime is 25415783. The reversal of 25415780 is 8751452.

It is not an unprimeable number, because it can be changed into a prime (25415783) 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, 16691 + ... + 18149.

It is an arithmetic number, because the mean of its divisors is an integer number (1216180).

Almost surely, 2^25415780 is an apocalyptic number.

25415780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25415780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29188320).

25415780 is an abundant number, since it is smaller than the sum of its proper divisors (32960860).

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

25415780 is a wasteful number, since it uses less digits than its factorization.

25415780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1546 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 25415780 is about 5041.4065497637. The cubic root of 25415780 is about 294.0138670245.

The spelling of 25415780 in words is "twenty-five million, four hundred fifteen thousand, seven hundred eighty".