1813717380 has 48 divisors (see below), whose sum is σ = 5110781760. Its totient is φ = 480574848.

The previous prime is 1813717363. The next prime is 1813717397. The reversal of 1813717380 is 837173181.

It is an interprime number because it is at equal distance from previous prime (1813717363) and next prime (1813717397).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86850 + ... + 105689.

It is an arithmetic number, because the mean of its divisors is an integer number (106474620).

Almost surely, 2^1813717380 is an apocalyptic number.

1813717380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1813717380 is an abundant number, since it is smaller than the sum of its proper divisors (3297064380).

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

1813717380 is a wasteful number, since it uses less digits than its factorization.

1813717380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192708 (or 192706 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 1813717380 is about 42587.7609178975. The cubic root of 1813717380 is about 1219.5226520956.

The spelling of 1813717380 in words is "one billion, eight hundred thirteen million, seven hundred seventeen thousand, three hundred eighty".