25783140 has 24 divisors (see below), whose sum is σ = 72192960. Its totient is φ = 6875488.

The previous prime is 25783139. The next prime is 25783181. The reversal of 25783140 is 4138752.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25783098 and 25783107.

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, 214800 + ... + 214919.

It is an arithmetic number, because the mean of its divisors is an integer number (3008040).

Almost surely, 2^25783140 is an apocalyptic number.

25783140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25783140 is an abundant number, since it is smaller than the sum of its proper divisors (46409820).

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

25783140 is a wasteful number, since it uses less digits than its factorization.

25783140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429731 (or 429729 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 25783140 is about 5077.7101138210. The cubic root of 25783140 is about 295.4236563440.

The spelling of 25783140 in words is "twenty-five million, seven hundred eighty-three thousand, one hundred forty".