1999373490 has 64 divisors (see below), whose sum is σ = 5406808320. Its totient is φ = 525651840.

The previous prime is 1999373459. The next prime is 1999373501. The reversal of 1999373490 is 943739991.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 32979 + ... + 71318.

It is an arithmetic number, because the mean of its divisors is an integer number (84481380).

Almost surely, 2^1999373490 is an apocalyptic number.

1999373490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999373490 is an abundant number, since it is smaller than the sum of its proper divisors (3407434830).

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

1999373490 is a wasteful number, since it uses less digits than its factorization.

1999373490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104384 (or 104378 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 54.

The square root of 1999373490 is about 44714.3544066109. The cubic root of 1999373490 is about 1259.7894772992.

The spelling of 1999373490 in words is "one billion, nine hundred ninety-nine million, three hundred seventy-three thousand, four hundred ninety".