1244847990 has 16 divisors (see below), whose sum is σ = 2987635248. Its totient is φ = 331959456.

The previous prime is 1244847977. The next prime is 1244848013. The reversal of 1244847990 is 997484421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20747437 + ... + 20747496.

It is an arithmetic number, because the mean of its divisors is an integer number (186727203).

Almost surely, 2^1244847990 is an apocalyptic number.

1244847990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1244847990 is an abundant number, since it is smaller than the sum of its proper divisors (1742787258).

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

1244847990 is a wasteful number, since it uses less digits than its factorization.

1244847990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41494943.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1244847990 is about 35282.4034045301. The cubic root of 1244847990 is about 1075.7353512057.

The spelling of 1244847990 in words is "one billion, two hundred forty-four million, eight hundred forty-seven thousand, nine hundred ninety".