245139456 has 96 divisors (see below), whose sum is σ = 692284320. Its totient is φ = 76873728.

The previous prime is 245139403. The next prime is 245139481. The reversal of 245139456 is 654931542.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-4 number, since 4×245139456⁴ (a number of 35 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103275 + ... + 105621.

It is an arithmetic number, because the mean of its divisors is an integer number (7211295).

Almost surely, 2^245139456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245139456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346142160).

245139456 is an abundant number, since it is smaller than the sum of its proper divisors (447144864).

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

245139456 is a wasteful number, since it uses less digits than its factorization.

245139456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2369 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 245139456 is about 15656.9299672701. The cubic root of 245139456 is about 625.8511760593.

The spelling of 245139456 in words is "two hundred forty-five million, one hundred thirty-nine thousand, four hundred fifty-six".