25430490 has 64 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 6704640.

The previous prime is 25430459. The next prime is 25430491. The reversal of 25430490 is 9403452.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25705 + ... + 26675.

It is an arithmetic number, because the mean of its divisors is an integer number (1071630).

Almost surely, 2^25430490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25430490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

25430490 is an abundant number, since it is smaller than the sum of its proper divisors (43153830).

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

25430490 is a wasteful number, since it uses less digits than its factorization.

25430490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 25430490 is about 5042.8652569745. The cubic root of 25430490 is about 294.0705786405.

The spelling of 25430490 in words is "twenty-five million, four hundred thirty thousand, four hundred ninety".