1321992672 has 192 divisors, whose sum is σ = 4659669504. Its totient is φ = 316938240.

The previous prime is 1321992649. The next prime is 1321992701. The reversal of 1321992672 is 2762991231.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89218 + ... + 102974.

It is an arithmetic number, because the mean of its divisors is an integer number (24269112).

Almost surely, 2^1321992672 is an apocalyptic number.

1321992672 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 1321992672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329834752).

1321992672 is an abundant number, since it is smaller than the sum of its proper divisors (3337676832).

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

1321992672 is a wasteful number, since it uses less digits than its factorization.

1321992672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13801 (or 13793 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 1321992672 is about 36359.2171532887. The cubic root of 1321992672 is about 1097.5130238888.

The spelling of 1321992672 in words is "one billion, three hundred twenty-one million, nine hundred ninety-two thousand, six hundred seventy-two".