245398820 has 12 divisors (see below), whose sum is σ = 515337564. Its totient is φ = 98159520.

The previous prime is 245398819. The next prime is 245398831. The reversal of 245398820 is 28893542.

It can be written as a sum of positive squares in 2 ways, for example, as 63904036 + 181494784 = 7994^2 + 13472^2 .

It is a hoax number, since the sum of its digits (41) 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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6134951 + ... + 6134990.

It is an arithmetic number, because the mean of its divisors is an integer number (42944797).

Almost surely, 2^245398820 is an apocalyptic number.

245398820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245398820 is an abundant number, since it is smaller than the sum of its proper divisors (269938744).

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

245398820 is a wasteful number, since it uses less digits than its factorization.

245398820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12269950 (or 12269948 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 245398820 is about 15665.2104997028. The cubic root of 245398820 is about 626.0718206036.

The spelling of 245398820 in words is "two hundred forty-five million, three hundred ninety-eight thousand, eight hundred twenty".