1921248992 has 48 divisors (see below), whose sum is σ = 4287825360. Its totient is φ = 840056832.

The previous prime is 1921248991. The next prime is 1921249003. The reversal of 1921248992 is 2998421291.

It is a super-2 number, since 2×1921248992² = 7382395378522032128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921248991) 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, 113633 + ... + 129440.

It is an arithmetic number, because the mean of its divisors is an integer number (89329695).

Almost surely, 2^1921248992 is an apocalyptic number.

It is an amenable number.

1921248992 is an abundant number, since it is smaller than the sum of its proper divisors (2366576368).

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

1921248992 is a wasteful number, since it uses less digits than its factorization.

1921248992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243115 (or 243107 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 1921248992 is about 43832.0543894534. The cubic root of 1921248992 is about 1243.1624515006.

The spelling of 1921248992 in words is "one billion, nine hundred twenty-one million, two hundred forty-eight thousand, nine hundred ninety-two".