1990280472 has 32 divisors (see below), whose sum is σ = 4983478080. Its totient is φ = 662389920.

The previous prime is 1990280443. The next prime is 1990280473. The reversal of 1990280472 is 2740820991.

It is a super-2 number, since 2×1990280472² = 7922432714449085568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990280473) 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 7 ways as a sum of consecutive naturals, for example, 49054 + ... + 79917.

It is an arithmetic number, because the mean of its divisors is an integer number (155733690).

Almost surely, 2^1990280472 is an apocalyptic number.

1990280472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990280472 is an abundant number, since it is smaller than the sum of its proper divisors (2993197608).

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

1990280472 is a wasteful number, since it uses less digits than its factorization.

1990280472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129623 (or 129619 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1990280472 is about 44612.5595768725. The cubic root of 1990280472 is about 1257.8767617368.

The spelling of 1990280472 in words is "one billion, nine hundred ninety million, two hundred eighty thousand, four hundred seventy-two".