245778492 has 12 divisors (see below), whose sum is σ = 573483176. Its totient is φ = 81926160.

The previous prime is 245778479. The next prime is 245778493. The reversal of 245778492 is 294877542.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245778493) by changing a digit.

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, 10240759 + ... + 10240782.

Almost surely, 2^245778492 is an apocalyptic number.

It is an amenable number.

245778492 is an abundant number, since it is smaller than the sum of its proper divisors (327704684).

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

245778492 is a wasteful number, since it uses less digits than its factorization.

245778492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20481548 (or 20481546 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The square root of 245778492 is about 15677.3241339203. The cubic root of 245778492 is about 626.3945326384.

The spelling of 245778492 in words is "two hundred forty-five million, seven hundred seventy-eight thousand, four hundred ninety-two".