812748040 has 96 divisors (see below), whose sum is σ = 1992211200. Its totient is φ = 298272000.

The previous prime is 812748029. The next prime is 812748061. The reversal of 812748040 is 40847218.

It is a junction number, because it is equal to n+sod(n) for n = 812747987 and 812748005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1696521 + ... + 1696999.

It is an arithmetic number, because the mean of its divisors is an integer number (20752200).

Almost surely, 2^812748040 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 812748040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996105600).

812748040 is an abundant number, since it is smaller than the sum of its proper divisors (1179463160).

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

812748040 is a wasteful number, since it uses less digits than its factorization.

812748040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 812748040 is about 28508.7362048899. The cubic root of 812748040 is about 933.2227346272. Note that the first 3 decimals are identical.

The spelling of 812748040 in words is "eight hundred twelve million, seven hundred forty-eight thousand, forty".