1320202890 has 48 divisors (see below), whose sum is σ = 3543261696. Its totient is φ = 340696800.

The previous prime is 1320202889. The next prime is 1320202901. The reversal of 1320202890 is 982020231.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233806 + ... + 239385.

It is an arithmetic number, because the mean of its divisors is an integer number (73817952).

Almost surely, 2^1320202890 is an apocalyptic number.

1320202890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320202890 is an abundant number, since it is smaller than the sum of its proper divisors (2223058806).

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

1320202890 is a wasteful number, since it uses less digits than its factorization.

1320202890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473235 (or 473232 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1320202890 is about 36334.5963236142. The cubic root of 1320202890 is about 1097.0175102538.

The spelling of 1320202890 in words is "one billion, three hundred twenty million, two hundred two thousand, eight hundred ninety".