245104640 has 152 divisors (see below), whose sum is σ = 679475952. Its totient is φ = 83886080.

The previous prime is 245104633. The next prime is 245104663. The reversal of 245104640 is 46401542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14417912 + ... + 14417928.

Almost surely, 2^245104640 is an apocalyptic number.

245104640 is a gapful number since it is divisible by the number (20) 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 245104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339737976).

245104640 is an abundant number, since it is smaller than the sum of its proper divisors (434371312).

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

245104640 is an frugal number, since it uses more digits than its factorization.

245104640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 245104640 is about 15655.8180878548. The cubic root of 245104640 is about 625.8215457603.

The spelling of 245104640 in words is "two hundred forty-five million, one hundred four thousand, six hundred forty".