25428780 has 72 divisors (see below), whose sum is σ = 83074992. Its totient is φ = 6258816.

The previous prime is 25428779. The next prime is 25428811. The reversal of 25428780 is 8782452.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3094 + ... + 7773.

Almost surely, 2^25428780 is an apocalyptic number.

25428780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25428780 is an abundant number, since it is smaller than the sum of its proper divisors (57646212).

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

25428780 is a wasteful number, since it uses less digits than its factorization.

25428780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10895 (or 10890 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 25428780 is about 5042.6957076548. The cubic root of 25428780 is about 294.0639871832.

The spelling of 25428780 in words is "twenty-five million, four hundred twenty-eight thousand, seven hundred eighty".