245723520 has 256 divisors, whose sum is σ = 916531200. Its totient is φ = 54829056.

The previous prime is 245723507. The next prime is 245723531. The reversal of 245723520 is 25327542.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 631486 + ... + 631874.

It is an arithmetic number, because the mean of its divisors is an integer number (3580200).

Almost surely, 2^245723520 is an apocalyptic number.

245723520 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 245723520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458265600).

245723520 is an abundant number, since it is smaller than the sum of its proper divisors (670807680).

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

245723520 is a wasteful number, since it uses less digits than its factorization.

245723520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 245723520 is about 15675.5708030043. The cubic root of 245723520 is about 626.3478283512.

The spelling of 245723520 in words is "two hundred forty-five million, seven hundred twenty-three thousand, five hundred twenty".