245320040 has 128 divisors (see below), whose sum is σ = 655672320. Its totient is φ = 80870400.

The previous prime is 245320021. The next prime is 245320051. The reversal of 245320040 is 40023542.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 245319994 and 245320021.

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, 905105 + ... + 905375.

It is an arithmetic number, because the mean of its divisors is an integer number (5122440).

Almost surely, 2^245320040 is an apocalyptic number.

245320040 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 245320040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327836160).

245320040 is an abundant number, since it is smaller than the sum of its proper divisors (410352280).

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

245320040 is a wasteful number, since it uses less digits than its factorization.

245320040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 245320040 is about 15662.6958088319. The cubic root of 245320040 is about 626.0048178135.

Adding to 245320040 its reverse (40023542), we get a palindrome (285343582).

The spelling of 245320040 in words is "two hundred forty-five million, three hundred twenty thousand, forty".