1990730 has 16 divisors (see below), whose sum is σ = 4095360. Its totient is φ = 682512.

The previous prime is 1990693. The next prime is 1990753. The reversal of 1990730 is 370991.

It is a junction number, because it is equal to n+sod(n) for n = 1990693 and 1990702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14150 + ... + 14289.

It is an arithmetic number, because the mean of its divisors is an integer number (255960).

2^1990730 is an apocalyptic number.

1990730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990730 is an abundant number, since it is smaller than the sum of its proper divisors (2104630).

1990730 is a wasteful number, since it uses less digits than its factorization.

1990730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28453.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 1990730 is about 1410.9323158819. The cubic root of 1990730 is about 125.7971456642.

The spelling of 1990730 in words is "one million, nine hundred ninety thousand, seven hundred thirty".