1880821290 has 96 divisors (see below), whose sum is σ = 4739829696. Its totient is φ = 477361920.

The previous prime is 1880821279. The next prime is 1880821291. The reversal of 1880821290 is 921280881.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1880821291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2273857 + ... + 2274683.

It is an arithmetic number, because the mean of its divisors is an integer number (49373226).

Almost surely, 2^1880821290 is an apocalyptic number.

1880821290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1880821290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2369914848).

1880821290 is an abundant number, since it is smaller than the sum of its proper divisors (2859008406).

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

1880821290 is a wasteful number, since it uses less digits than its factorization.

1880821290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 1880821290 is about 43368.4365639344. The cubic root of 1880821290 is about 1234.3808552753.

The spelling of 1880821290 in words is "one billion, eight hundred eighty million, eight hundred twenty-one thousand, two hundred ninety".