245773640 has 64 divisors (see below), whose sum is σ = 636284160. Its totient is φ = 83692800.

The previous prime is 245773631. The next prime is 245773651. The reversal of 245773640 is 46377542.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 245773594 and 245773603.

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 15 ways as a sum of consecutive naturals, for example, 39374 + ... + 45186.

It is an arithmetic number, because the mean of its divisors is an integer number (9941940).

Almost surely, 2^245773640 is an apocalyptic number.

245773640 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 245773640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318142080).

245773640 is an abundant number, since it is smaller than the sum of its proper divisors (390510520).

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

245773640 is a wasteful number, since it uses less digits than its factorization.

245773640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982 (or 5978 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

The square root of 245773640 is about 15677.1693873607. The cubic root of 245773640 is about 626.3904106527.

The spelling of 245773640 in words is "two hundred forty-five million, seven hundred seventy-three thousand, six hundred forty".