1905230730 has 64 divisors (see below), whose sum is σ = 4950263808. Its totient is φ = 466506240.

The previous prime is 1905230711. The next prime is 1905230779. The reversal of 1905230730 is 370325091.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61702 + ... + 87278.

It is an arithmetic number, because the mean of its divisors is an integer number (77347872).

Almost surely, 2^1905230730 is an apocalyptic number.

1905230730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1905230730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475131904).

1905230730 is an abundant number, since it is smaller than the sum of its proper divisors (3045033078).

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

1905230730 is a wasteful number, since it uses less digits than its factorization.

1905230730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25791.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 1905230730 is about 43648.9487845927. The cubic root of 1905230730 is about 1239.6978820854.

The spelling of 1905230730 in words is "one billion, nine hundred five million, two hundred thirty thousand, seven hundred thirty".