25309090 has 32 divisors (see below), whose sum is σ = 49163760. Its totient is φ = 9348352.

The previous prime is 25309087. The next prime is 25309091. The reversal of 25309090 is 9090352.

It can be written as a sum of positive squares in 8 ways, for example, as 13344409 + 11964681 = 3653^2 + 3459^2 .

25309090 is a modest number, since divided by 9090 gives 2530 as remainder.

It is not an unprimeable number, because it can be changed into a prime (25309091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477504 + ... + 477556.

Almost surely, 2^25309090 is an apocalyptic number.

25309090 is a deficient number, since it is larger than the sum of its proper divisors (23854670).

25309090 is an frugal number, since it uses more digits than its factorization.

25309090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 25309090 is about 5030.8140494357. The cubic root of 25309090 is about 293.6018876080.

The spelling of 25309090 in words is "twenty-five million, three hundred nine thousand, ninety".