1990734 has 32 divisors (see below), whose sum is σ = 4367520. Its totient is φ = 602112.

The previous prime is 1990693. The next prime is 1990753. The reversal of 1990734 is 4370991.

It is a junction number, because it is equal to n+sod(n) for n = 1990695 and 1990704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2622 + ... + 3294.

It is an arithmetic number, because the mean of its divisors is an integer number (136485).

2^1990734 is an apocalyptic number.

1990734 is an abundant number, since it is smaller than the sum of its proper divisors (2376786).

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

1990734 is a wasteful number, since it uses less digits than its factorization.

1990734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1990734 is about 1410.9337333837. The cubic root of 1990734 is about 125.7972299194.

The spelling of 1990734 in words is "one million, nine hundred ninety thousand, seven hundred thirty-four".