25415490 has 32 divisors (see below), whose sum is σ = 62487936. Its totient is φ = 6611840.

The previous prime is 25415479. The next prime is 25415491. The reversal of 25415490 is 9451452.

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

It is not an unprimeable number, because it can be changed into a prime (25415491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9102 + ... + 11561.

It is an arithmetic number, because the mean of its divisors is an integer number (1952748).

Almost surely, 2^25415490 is an apocalyptic number.

25415490 is an abundant number, since it is smaller than the sum of its proper divisors (37072446).

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

25415490 is a wasteful number, since it uses less digits than its factorization.

25415490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20714.

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

The square root of 25415490 is about 5041.3777878671. The cubic root of 25415490 is about 294.0127487646.

The spelling of 25415490 in words is "twenty-five million, four hundred fifteen thousand, four hundred ninety".