25193780 has 12 divisors (see below), whose sum is σ = 52906980. Its totient is φ = 10077504.

The previous prime is 25193747. The next prime is 25193801. The reversal of 25193780 is 8739152.

It can be written as a sum of positive squares in 2 ways, for example, as 8514724 + 16679056 = 2918^2 + 4084^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25193780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629825 + ... + 629864.

It is an arithmetic number, because the mean of its divisors is an integer number (4408915).

Almost surely, 2^25193780 is an apocalyptic number.

25193780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25193780 is an abundant number, since it is smaller than the sum of its proper divisors (27713200).

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

25193780 is a wasteful number, since it uses less digits than its factorization.

25193780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259698 (or 1259696 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 25193780 is about 5019.3405941418. The cubic root of 25193780 is about 293.1553184134.

The spelling of 25193780 in words is "twenty-five million, one hundred ninety-three thousand, seven hundred eighty".