1243492992 has 256 divisors, whose sum is σ = 4284000000. Its totient is φ = 354945024.

The previous prime is 1243492961. The next prime is 1243492993. The reversal of 1243492992 is 2992943421.

1243492992 is a `hidden beast` number, since 12 + 4 + 349 + 299 + 2 = 666.

It is a super-2 number, since 2×1243492992² = 3092549642306224128, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1243492993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1184884 + ... + 1185932.

It is an arithmetic number, because the mean of its divisors is an integer number (16734375).

Almost surely, 2^1243492992 is an apocalyptic number.

1243492992 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 1243492992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2142000000).

1243492992 is an abundant number, since it is smaller than the sum of its proper divisors (3040507008).

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

1243492992 is an equidigital number, since it uses as much as digits as its factorization.

1243492992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1061 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1243492992 is about 35263.1959980941. The cubic root of 1243492992 is about 1075.3449023460.

The spelling of 1243492992 in words is "one billion, two hundred forty-three million, four hundred ninety-two thousand, nine hundred ninety-two".