991826830 has 16 divisors (see below), whose sum is σ = 1807888320. Its totient is φ = 391708512.

The previous prime is 991826827. The next prime is 991826831. The reversal of 991826830 is 38628199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991826831) 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, 626949 + ... + 628528.

It is an arithmetic number, because the mean of its divisors is an integer number (112993020).

Almost surely, 2^991826830 is an apocalyptic number.

991826830 is a deficient number, since it is larger than the sum of its proper divisors (816061490).

991826830 is a wasteful number, since it uses less digits than its factorization.

991826830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255563.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 991826830 is about 31493.2822995635. The cubic root of 991826830 is about 997.2681538123.

The spelling of 991826830 in words is "nine hundred ninety-one million, eight hundred twenty-six thousand, eight hundred thirty".