801320640 has 56 divisors (see below), whose sum is σ = 2544196080. Its totient is φ = 213685248.

The previous prime is 801320627. The next prime is 801320651. The reversal of 801320640 is 46023108.

It is a happy number.

801320640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×801320640² = 1284229536180019200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 801320640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416395 + ... + 418314.

Almost surely, 2^801320640 is an apocalyptic number.

801320640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

801320640 is an abundant number, since it is smaller than the sum of its proper divisors (1742875440).

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

801320640 is a wasteful number, since it uses less digits than its factorization.

801320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834729 (or 834719 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 801320640 is about 28307.6074580668. The cubic root of 801320640 is about 928.8283082147.

Adding to 801320640 its reverse (46023108), we get a palindrome (847343748).

The spelling of 801320640 in words is "eight hundred one million, three hundred twenty thousand, six hundred forty".