1990084 has 6 divisors (see below), whose sum is σ = 3482654. Its totient is φ = 995040.

The previous prime is 1990081. The next prime is 1990103. The reversal of 1990084 is 4800991.

It can be written as a sum of positive squares in only one way, i.e., 1617984 + 372100 = 1272^2 + 610^2 .

It is not an unprimeable number, because it can be changed into a prime (1990081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248757 + ... + 248764.

2^1990084 is an apocalyptic number.

It is an amenable number.

1990084 is a deficient number, since it is larger than the sum of its proper divisors (1492570).

1990084 is a wasteful number, since it uses less digits than its factorization.

1990084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497525 (or 497523 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1990084 is about 1410.7033706630. The cubic root of 1990084 is about 125.7835369632.

The spelling of 1990084 in words is "one million, nine hundred ninety thousand, eighty-four".