25415940 has 96 divisors (see below), whose sum is σ = 78632064. Its totient is φ = 6082560.

The previous prime is 25415921. The next prime is 25415953. The reversal of 25415940 is 4951452.

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 = 25415898 and 25415907.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63822 + ... + 64218.

It is an arithmetic number, because the mean of its divisors is an integer number (819084).

Almost surely, 2^25415940 is an apocalyptic number.

25415940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25415940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39316032).

25415940 is an abundant number, since it is smaller than the sum of its proper divisors (53216124).

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

25415940 is a wasteful number, since it uses less digits than its factorization.

25415940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 25415940 is about 5041.4224183260. The cubic root of 25415940 is about 294.0144839919.

The spelling of 25415940 in words is "twenty-five million, four hundred fifteen thousand, nine hundred forty".