1990332 has 30 divisors (see below), whose sum is σ = 5203968. Its totient is φ = 663336.

The previous prime is 1990327. The next prime is 1990337. The reversal of 1990332 is 2330991.

It is an interprime number because it is at equal distance from previous prime (1990327) and next prime (1990337).

It is a super-2 number, since 2×1990332² = 7922842940448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1990296 and 1990305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990337) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2748 + ... + 3395.

2^1990332 is an apocalyptic number.

1990332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990332 is an abundant number, since it is smaller than the sum of its proper divisors (3213636).

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

1990332 is a wasteful number, since it uses less digits than its factorization.

1990332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6159 (or 6148 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 1990332 is about 1410.7912673390. The cubic root of 1990332 is about 125.7887617043.

The spelling of 1990332 in words is "one million, nine hundred ninety thousand, three hundred thirty-two".