1990329 has 12 divisors (see below), whose sum is σ = 2917488. Its totient is φ = 1206040.

The previous prime is 1990327. The next prime is 1990337. The reversal of 1990329 is 9230991.

It is not a de Polignac number, because 1990329 - 2¹ = 1990327 is a prime.

It is a super-2 number, since 2×1990329² = 7922819056482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

1990329 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990329.

It is not an unprimeable number, because it can be changed into a prime (1990321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2379 + ... + 3104.

It is an arithmetic number, because the mean of its divisors is an integer number (243124).

2^1990329 is an apocalyptic number.

It is an amenable number.

1990329 is a deficient number, since it is larger than the sum of its proper divisors (927159).

1990329 is a wasteful number, since it uses less digits than its factorization.

1990329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5508 (or 5497 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 1990329 is about 1410.7902041055. The cubic root of 1990329 is about 125.7886985044.

The spelling of 1990329 in words is "one million, nine hundred ninety thousand, three hundred twenty-nine".