1836742720 has 28 divisors (see below), whose sum is σ = 4373744364. Its totient is φ = 734696960.

The previous prime is 1836742703. The next prime is 1836742729. The reversal of 1836742720 is 272476381.

It can be written as a sum of positive squares in 2 ways, for example, as 272382016 + 1564360704 = 16504^2 + 39552^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1836742729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2869591 + ... + 2870230.

Almost surely, 2^1836742720 is an apocalyptic number.

1836742720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1836742720 is an abundant number, since it is smaller than the sum of its proper divisors (2537001644).

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

1836742720 is an equidigital number, since it uses as much as digits as its factorization.

1836742720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739838 (or 5739828 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 1836742720 is about 42857.2364951358. The cubic root of 1836742720 is about 1224.6616241583.

The spelling of 1836742720 in words is "one billion, eight hundred thirty-six million, seven hundred forty-two thousand, seven hundred twenty".