1830781264 has 40 divisors (see below), whose sum is σ = 3862955880. Its totient is φ = 835473408.

The previous prime is 1830781261. The next prime is 1830781273. The reversal of 1830781264 is 4621870381.

It can be written as a sum of positive squares in 4 ways, for example, as 652864 + 1830128400 = 808^2 + 42780^2 .

It is a super-2 number, since 2×1830781264² = 6703520073226875392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830781261) 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, 30937 + ... + 67960.

It is an arithmetic number, because the mean of its divisors is an integer number (96573897).

Almost surely, 2^1830781264 is an apocalyptic number.

It is an amenable number.

1830781264 is an abundant number, since it is smaller than the sum of its proper divisors (2032174616).

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

1830781264 is a wasteful number, since it uses less digits than its factorization.

1830781264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99007 (or 99001 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1830781264 is about 42787.6298011470. The cubic root of 1830781264 is about 1223.3352400109.

The spelling of 1830781264 in words is "one billion, eight hundred thirty million, seven hundred eighty-one thousand, two hundred sixty-four".