1244947992 has 32 divisors (see below), whose sum is σ = 3115050480. Its totient is φ = 414625280.

The previous prime is 1244947973. The next prime is 1244947993. The reversal of 1244947992 is 2997494421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244947993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6892 + ... + 50372.

Almost surely, 2^1244947992 is an apocalyptic number.

1244947992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1244947992 is an abundant number, since it is smaller than the sum of its proper divisors (1870102488).

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

1244947992 is a wasteful number, since it uses less digits than its factorization.

1244947992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44683 (or 44679 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 51.

The square root of 1244947992 is about 35283.8205414323. The cubic root of 1244947992 is about 1075.7641560095.

The spelling of 1244947992 in words is "one billion, two hundred forty-four million, nine hundred forty-seven thousand, nine hundred ninety-two".