245665090 has 48 divisors (see below), whose sum is σ = 502883640. Its totient is φ = 86240000.

The previous prime is 245665067. The next prime is 245665097. The reversal of 245665090 is 90566542.

It can be written as a sum of positive squares in 4 ways, for example, as 191185929 + 54479161 = 13827^2 + 7381^2 .

It is not an unprimeable number, because it can be changed into a prime (245665097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31590 + ... + 38590.

Almost surely, 2^245665090 is an apocalyptic number.

245665090 is an abundant number, since it is smaller than the sum of its proper divisors (257218550).

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

245665090 is a wasteful number, since it uses less digits than its factorization.

245665090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059 (or 7048 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 245665090 is about 15673.7069642124. The cubic root of 245665090 is about 626.2981785052.

The spelling of 245665090 in words is "two hundred forty-five million, six hundred sixty-five thousand, ninety".