811340442 has 64 divisors (see below), whose sum is σ = 1978905600. Its totient is φ = 244358640.

The previous prime is 811340429. The next prime is 811340459. The reversal of 811340442 is 244043118.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95109 + ... + 103287.

It is an arithmetic number, because the mean of its divisors is an integer number (30920400).

Almost surely, 2^811340442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811340442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989452800).

811340442 is an abundant number, since it is smaller than the sum of its proper divisors (1167565158).

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

811340442 is a wasteful number, since it uses less digits than its factorization.

811340442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368 (or 8362 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 811340442 is about 28484.0383723938. The cubic root of 811340442 is about 932.6836739494.

The spelling of 811340442 in words is "eight hundred eleven million, three hundred forty thousand, four hundred forty-two".