25784940 has 48 divisors (see below), whose sum is σ = 72481248. Its totient is φ = 6849024.

The previous prime is 25784929. The next prime is 25784951. The reversal of 25784940 is 4948752.

It is an interprime number because it is at equal distance from previous prime (25784929) and next prime (25784951).

It is a super-3 number, since 3×25784940³ (a number of 23 digits) contains 333 as substring.

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, 18094 + ... + 19466.

It is an arithmetic number, because the mean of its divisors is an integer number (1510026).

Almost surely, 2^25784940 is an apocalyptic number.

25784940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25784940 is an abundant number, since it is smaller than the sum of its proper divisors (46696308).

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

25784940 is a wasteful number, since it uses less digits than its factorization.

25784940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698 (or 1696 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 25784940 is about 5077.8873559779. The cubic root of 25784940 is about 295.4305309942.

The spelling of 25784940 in words is "twenty-five million, seven hundred eighty-four thousand, nine hundred forty".