245640120 has 128 divisors (see below), whose sum is σ = 815546880. Its totient is φ = 58688000.

The previous prime is 245640079. The next prime is 245640139. The reversal of 245640120 is 21046542.

245640120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×245640120² = 120678137107228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92410 + ... + 95030.

It is an arithmetic number, because the mean of its divisors is an integer number (6371460).

Almost surely, 2^245640120 is an apocalyptic number.

245640120 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 245640120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407773440).

245640120 is an abundant number, since it is smaller than the sum of its proper divisors (569906760).

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

245640120 is a wasteful number, since it uses less digits than its factorization.

245640120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2713 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 245640120 is about 15672.9103870341. The cubic root of 245640120 is about 626.2769582938.

Adding to 245640120 its reverse (21046542), we get a palindrome (266686662).

The spelling of 245640120 in words is "two hundred forty-five million, six hundred forty thousand, one hundred twenty".