25783812 has 48 divisors (see below), whose sum is σ = 67267200. Its totient is φ = 8540640.

The previous prime is 25783799. The next prime is 25783837. The reversal of 25783812 is 21838752.

25783812 is a `hidden beast` number, since 2 + 578 + 3 + 81 + 2 = 666.

It is a super-2 number, since 2×25783812² = 1329609922502688, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 18889 + ... + 20207.

It is an arithmetic number, because the mean of its divisors is an integer number (1401400).

Almost surely, 2^25783812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25783812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33633600).

25783812 is an abundant number, since it is smaller than the sum of its proper divisors (41483388).

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

25783812 is a wasteful number, since it uses less digits than its factorization.

25783812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513 (or 1505 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 25783812 is about 5077.7762849499. The cubic root of 25783812 is about 295.4262229175.

The spelling of 25783812 in words is "twenty-five million, seven hundred eighty-three thousand, eight hundred twelve".