1332397640 has 128 divisors (see below), whose sum is σ = 3500236800. Its totient is φ = 447068160.

The previous prime is 1332397637. The next prime is 1332397669. The reversal of 1332397640 is 467932331.

It is a junction number, because it is equal to n+sod(n) for n = 1332397594 and 1332397603.

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, 3164630 + ... + 3165050.

It is an arithmetic number, because the mean of its divisors is an integer number (27345600).

Almost surely, 2^1332397640 is an apocalyptic number.

1332397640 is a gapful number since it is divisible by the number (10) 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 1332397640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750118400).

1332397640 is an abundant number, since it is smaller than the sum of its proper divisors (2167839160).

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

1332397640 is a wasteful number, since it uses less digits than its factorization.

1332397640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 1332397640 is about 36502.0224097241. The cubic root of 1332397640 is about 1100.3848901046.

The spelling of 1332397640 in words is "one billion, three hundred thirty-two million, three hundred ninety-seven thousand, six hundred forty".