245644812 has 144 divisors (see below), whose sum is σ = 746869760. Its totient is φ = 69144192.

The previous prime is 245644799. The next prime is 245644843. The reversal of 245644812 is 218446542.

245644812 is a `hidden beast` number, since 2 + 4 + 5 + 644 + 8 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 537288 + ... + 537744.

Almost surely, 2^245644812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245644812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373434880).

245644812 is an abundant number, since it is smaller than the sum of its proper divisors (501224948).

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

245644812 is a wasteful number, since it uses less digits than its factorization.

245644812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 548 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 245644812 is about 15673.0600713454. The cubic root of 245644812 is about 626.2809457977.

The spelling of 245644812 in words is "two hundred forty-five million, six hundred forty-four thousand, eight hundred twelve".