1244640798 has 24 divisors (see below), whose sum is σ = 2708304768. Its totient is φ = 413098272.

The previous prime is 1244640769. The next prime is 1244640829. The reversal of 1244640798 is 8970464421.

It is a super-3 number, since 3×1244640798³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 144190 + ... + 152577.

It is an arithmetic number, because the mean of its divisors is an integer number (112846032).

Almost surely, 2^1244640798 is an apocalyptic number.

1244640798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1244640798 is an abundant number, since it is smaller than the sum of its proper divisors (1463663970).

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

1244640798 is a wasteful number, since it uses less digits than its factorization.

1244640798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297008 (or 297005 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1244640798 is about 35279.4670878119. The cubic root of 1244640798 is about 1075.6756662409.

The spelling of 1244640798 in words is "one billion, two hundred forty-four million, six hundred forty thousand, seven hundred ninety-eight".