1949257992 has 128 divisors (see below), whose sum is σ = 5405875200. Its totient is φ = 580819200.

The previous prime is 1949257987. The next prime is 1949257993. The reversal of 1949257992 is 2997529491.

It is not an unprimeable number, because it can be changed into a prime (1949257993) 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 31 ways as a sum of consecutive naturals, for example, 5429509 + ... + 5429867.

It is an arithmetic number, because the mean of its divisors is an integer number (42233400).

Almost surely, 2^1949257992 is an apocalyptic number.

1949257992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949257992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2702937600).

1949257992 is an abundant number, since it is smaller than the sum of its proper divisors (3456617208).

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

1949257992 is a wasteful number, since it uses less digits than its factorization.

1949257992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 663 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 57.

The square root of 1949257992 is about 44150.4019460752. The cubic root of 1949257992 is about 1249.1744932442.

The spelling of 1949257992 in words is "one billion, nine hundred forty-nine million, two hundred fifty-seven thousand, nine hundred ninety-two".