1901730 has 16 divisors (see below), whose sum is σ = 4564224. Its totient is φ = 507120.

The previous prime is 1901719. The next prime is 1901749. The reversal of 1901730 is 371091.

It is a junction number, because it is equal to n+sod(n) for n = 1901697 and 1901706.

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, 31666 + ... + 31725.

It is an arithmetic number, because the mean of its divisors is an integer number (285264).

2^1901730 is an apocalyptic number.

1901730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1901730 is an abundant number, since it is smaller than the sum of its proper divisors (2662494).

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

1901730 is a wasteful number, since it uses less digits than its factorization.

1901730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63401.

The product of its (nonzero) digits is 189, while the sum is 21.

The square root of 1901730 is about 1379.0322693831. The cubic root of 1901730 is about 123.8938130126.

The spelling of 1901730 in words is "one million, nine hundred one thousand, seven hundred thirty".