245415720 has 128 divisors (see below), whose sum is σ = 812592000. Its totient is φ = 58798080.

The previous prime is 245415713. The next prime is 245415721. The reversal of 245415720 is 27514542.

245415720 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-3 number, since 3×245415720³ (a number of 26 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (245415721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116436 + ... + 118524.

It is an arithmetic number, because the mean of its divisors is an integer number (6348375).

Almost surely, 2^245415720 is an apocalyptic number.

245415720 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 245415720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406296000).

245415720 is an abundant number, since it is smaller than the sum of its proper divisors (567176280).

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

245415720 is a wasteful number, since it uses less digits than its factorization.

245415720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 245415720 is about 15665.7499022549. The cubic root of 245415720 is about 626.0861922713.

The spelling of 245415720 in words is "two hundred forty-five million, four hundred fifteen thousand, seven hundred twenty".