1890732385 has 16 divisors (see below), whose sum is σ = 2297296080. Its totient is φ = 1493739520.

The previous prime is 1890732379. The next prime is 1890732391. The reversal of 1890732385 is 5832370981.

It is an interprime number because it is at equal distance from previous prime (1890732379) and next prime (1890732391).

It can be written as a sum of positive squares in 8 ways, for example, as 273968704 + 1616763681 = 16552^2 + 40209^2 .

It is not a de Polignac number, because 1890732385 - 2¹⁵ = 1890699617 is a prime.

It is an unprimeable number.

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, 152811 + ... + 164719.

It is an arithmetic number, because the mean of its divisors is an integer number (143581005).

Almost surely, 2^1890732385 is an apocalyptic number.

It is an amenable number.

1890732385 is a deficient number, since it is larger than the sum of its proper divisors (406563695).

1890732385 is a wasteful number, since it uses less digits than its factorization.

1890732385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12308.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 1890732385 is about 43482.5526504597. The cubic root of 1890732385 is about 1236.5452713045.

The spelling of 1890732385 in words is "one billion, eight hundred ninety million, seven hundred thirty-two thousand, three hundred eighty-five".