1890236730 has 16 divisors (see below), whose sum is σ = 4536568224. Its totient is φ = 504063120.

The previous prime is 1890236671. The next prime is 1890236737. The reversal of 1890236730 is 376320981.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1890236737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31503916 + ... + 31503975.

It is an arithmetic number, because the mean of its divisors is an integer number (283535514).

Almost surely, 2^1890236730 is an apocalyptic number.

1890236730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1890236730 is an abundant number, since it is smaller than the sum of its proper divisors (2646331494).

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

1890236730 is a wasteful number, since it uses less digits than its factorization.

1890236730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63007901.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1890236730 is about 43476.8528069822. The cubic root of 1890236730 is about 1236.4372085213.

The spelling of 1890236730 in words is "one billion, eight hundred ninety million, two hundred thirty-six thousand, seven hundred thirty".