8390025 has 54 divisors (see below), whose sum is σ = 17503902. Its totient is φ = 3830400.

The previous prime is 8390021. The next prime is 8390029. The reversal of 8390025 is 5200938.

It is an interprime number because it is at equal distance from previous prime (8390021) and next prime (8390029).

It can be written as a sum of positive squares in 3 ways, for example, as 112896 + 8277129 = 336^2 + 2877^2 .

It is not a de Polignac number, because 8390025 - 2² = 8390021 is a prime.

It is a Curzon number.

8390025 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8390021) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 10645 + ... + 11405.

Almost surely, 2^8390025 is an apocalyptic number.

It is an amenable number.

8390025 is an abundant number, since it is smaller than the sum of its proper divisors (9113877).

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

8390025 is a wasteful number, since it uses less digits than its factorization.

8390025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 8390025 is about 2896.5539870681. The cubic root of 8390025 is about 203.1987747797.

The spelling of 8390025 in words is "eight million, three hundred ninety thousand, twenty-five".