1990036 has 6 divisors (see below), whose sum is σ = 3482570. Its totient is φ = 995016.

The previous prime is 1990033. The next prime is 1990039. The reversal of 1990036 is 6300991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1990033) and next prime (1990039).

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 1936 = 1410^2 + 44^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1989986 and 1990013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248751 + ... + 248758.

2^1990036 is an apocalyptic number.

It is an amenable number.

1990036 is a deficient number, since it is larger than the sum of its proper divisors (1492534).

1990036 is a wasteful number, since it uses less digits than its factorization.

1990036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497513 (or 497511 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 1990036 is about 1410.6863577706. The cubic root of 1990036 is about 125.7825256728.

The spelling of 1990036 in words is "one million, nine hundred ninety thousand, thirty-six".