245772240 has 120 divisors (see below), whose sum is σ = 886327200. Its totient is φ = 56173824.

The previous prime is 245772223. The next prime is 245772257. The reversal of 245772240 is 42277542.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (245772223) and next prime (245772257).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1311 + ... + 22209.

It is an arithmetic number, because the mean of its divisors is an integer number (7386060).

Almost surely, 2^245772240 is an apocalyptic number.

245772240 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 245772240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443163600).

245772240 is an abundant number, since it is smaller than the sum of its proper divisors (640554960).

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

245772240 is a wasteful number, since it uses less digits than its factorization.

245772240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20929 (or 20916 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 33.

The square root of 245772240 is about 15677.1247363794. The cubic root of 245772240 is about 626.3892212816.

The spelling of 245772240 in words is "two hundred forty-five million, seven hundred seventy-two thousand, two hundred forty".