25311090 has 64 divisors (see below), whose sum is σ = 71064576. Its totient is φ = 5648832.

The previous prime is 25311061. The next prime is 25311101. The reversal of 25311090 is 9011352.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

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, 7629 + ... + 10431.

It is an arithmetic number, because the mean of its divisors is an integer number (1110384).

Almost surely, 2^25311090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25311090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35532288).

25311090 is an abundant number, since it is smaller than the sum of its proper divisors (45753486).

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

25311090 is a wasteful number, since it uses less digits than its factorization.

25311090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 25311090 is about 5031.0128204965. The cubic root of 25311090 is about 293.6096211708.

The spelling of 25311090 in words is "twenty-five million, three hundred eleven thousand, ninety".