1010091800 has 48 divisors (see below), whose sum is σ = 2388295800. Its totient is φ = 397184000.

The previous prime is 1010091769. The next prime is 1010091811. The reversal of 1010091800 is 81900101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31001 + ... + 54600.

Almost surely, 2^1010091800 is an apocalyptic number.

1010091800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1010091800 is an abundant number, since it is smaller than the sum of its proper divisors (1378204000).

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

1010091800 is a wasteful number, since it uses less digits than its factorization.

1010091800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85676 (or 85667 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1010091800 is about 31781.9414133246. The cubic root of 1010091800 is about 1003.3526803062.

Adding to 1010091800 its reverse (81900101), we get a palindrome (1091991901).

The spelling of 1010091800 in words is "one billion, ten million, ninety-one thousand, eight hundred".