1985730 has 16 divisors (see below), whose sum is σ = 4765824. Its totient is φ = 529520.

The previous prime is 1985729. The next prime is 1985741. The reversal of 1985730 is 375891.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1985691 and 1985700.

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, 33066 + ... + 33125.

It is an arithmetic number, because the mean of its divisors is an integer number (297864).

2^1985730 is an apocalyptic number.

1985730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1985730 is an abundant number, since it is smaller than the sum of its proper divisors (2780094).

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

1985730 is a wasteful number, since it uses less digits than its factorization.

1985730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66201.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 1985730 is about 1409.1593238523. The cubic root of 1985730 is about 125.6917382575.

The spelling of 1985730 in words is "one million, nine hundred eighty-five thousand, seven hundred thirty".