811496840 has 256 divisors, whose sum is σ = 2453760000. Its totient is φ = 238775040.

The previous prime is 811496789. The next prime is 811496849. The reversal of 811496840 is 48694118.

It is not an unprimeable number, because it can be changed into a prime (811496849) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2867339 + ... + 2867621.

It is an arithmetic number, because the mean of its divisors is an integer number (9585000).

Almost surely, 2^811496840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811496840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226880000).

811496840 is an abundant number, since it is smaller than the sum of its proper divisors (1642263160).

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

811496840 is a wasteful number, since it uses less digits than its factorization.

811496840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 811496840 is about 28486.7836022251. The cubic root of 811496840 is about 932.7435996731.

The spelling of 811496840 in words is "eight hundred eleven million, four hundred ninety-six thousand, eight hundred forty".