1920730 has 32 divisors (see below), whose sum is σ = 4126464. Its totient is φ = 629376.

The previous prime is 1920713. The next prime is 1920731. The reversal of 1920730 is 370291.

It is not an unprimeable number, because it can be changed into a prime (1920731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1014 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (128952).

2^1920730 is an apocalyptic number.

1920730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1920730 is an abundant number, since it is smaller than the sum of its proper divisors (2205734).

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

1920730 is a wasteful number, since it uses less digits than its factorization.

1920730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1920730 is about 1385.9040370819. The cubic root of 1920730 is about 124.3050501848.

The spelling of 1920730 in words is "one million, nine hundred twenty thousand, seven hundred thirty".