1990692 has 54 divisors (see below), whose sum is σ = 5543174. Its totient is φ = 601920.

The previous prime is 1990691. The next prime is 1990693. The reversal of 1990692 is 2960991.

It is an interprime number because it is at equal distance from previous prime (1990691) and next prime (1990693).

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 69696 = 1386^2 + 264^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990691) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4128 + ... + 4584.

2^1990692 is an apocalyptic number.

1990692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2771587).

1990692 is an abundant number, since it is smaller than the sum of its proper divisors (3552482).

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

1990692 is a wasteful number, since it uses less digits than its factorization.

1990692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1990692 is about 1410.9188495445. The cubic root of 1990692 is about 125.7963452338.

Subtracting 1990692 from its reverse (2960991), we obtain a cube (970299 = 99³).

The spelling of 1990692 in words is "one million, nine hundred ninety thousand, six hundred ninety-two".