810998730 has 80 divisors (see below), whose sum is σ = 2197619424. Its totient is φ = 214587360.

The previous prime is 810998711. The next prime is 810998761. The reversal of 810998730 is 37899018.

It is a super-2 number, since 2×810998730² = 1315437880123225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 102289 + ... + 109931.

Almost surely, 2^810998730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810998730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098809712).

810998730 is an abundant number, since it is smaller than the sum of its proper divisors (1386620694).

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

810998730 is a wasteful number, since it uses less digits than its factorization.

810998730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793 (or 7784 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 810998730 is about 28478.0394339217. The cubic root of 810998730 is about 932.5527161989.

The spelling of 810998730 in words is "eight hundred ten million, nine hundred ninety-eight thousand, seven hundred thirty".