1329981090 has 32 divisors (see below), whose sum is σ = 3259872000. Its totient is φ = 347115264.

The previous prime is 1329981053. The next prime is 1329981097. The reversal of 1329981090 is 901899231.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1329981097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470215 + ... + 473034.

It is an arithmetic number, because the mean of its divisors is an integer number (101871000).

Almost surely, 2^1329981090 is an apocalyptic number.

1329981090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1329981090 is an abundant number, since it is smaller than the sum of its proper divisors (1929890910).

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

1329981090 is a wasteful number, since it uses less digits than its factorization.

1329981090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943306.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 1329981090 is about 36468.9057965824. The cubic root of 1329981090 is about 1099.7192368843.

The spelling of 1329981090 in words is "one billion, three hundred twenty-nine million, nine hundred eighty-one thousand, ninety".