245645904 has 80 divisors (see below), whose sum is σ = 732814208. Its totient is φ = 69451776.

The previous prime is 245645899. The next prime is 245645909. The reversal of 245645904 is 409546542.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (245645899) and next prime (245645909).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245645909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28824 + ... + 36360.

Almost surely, 2^245645904 is an apocalyptic number.

245645904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245645904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366407104).

245645904 is an abundant number, since it is smaller than the sum of its proper divisors (487168304).

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

245645904 is a wasteful number, since it uses less digits than its factorization.

245645904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7652 (or 7646 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 245645904 is about 15673.0949081539. The cubic root of 245645904 is about 626.2818738284.

The spelling of 245645904 in words is "two hundred forty-five million, six hundred forty-five thousand, nine hundred four".