245218920 has 32 divisors (see below), whose sum is σ = 735657120. Its totient is φ = 65391680.

The previous prime is 245218907. The next prime is 245218933. The reversal of 245218920 is 29812542.

It is an interprime number because it is at equal distance from previous prime (245218907) and next prime (245218933).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021626 + ... + 1021865.

It is an arithmetic number, because the mean of its divisors is an integer number (22989285).

Almost surely, 2^245218920 is an apocalyptic number.

245218920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245218920 is an abundant number, since it is smaller than the sum of its proper divisors (490438200).

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

245218920 is a wasteful number, since it uses less digits than its factorization.

245218920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043505 (or 2043501 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 245218920 is about 15659.4674238941. The cubic root of 245218920 is about 625.9187937138.

The spelling of 245218920 in words is "two hundred forty-five million, two hundred eighteen thousand, nine hundred twenty".