824081840 has 20 divisors (see below), whose sum is σ = 1915990464. Its totient is φ = 329632704.

The previous prime is 824081827. The next prime is 824081857. The reversal of 824081840 is 48180428.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×824081840² = 1358221758035571200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 824081840.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5150432 + ... + 5150591.

Almost surely, 2^824081840 is an apocalyptic number.

824081840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

824081840 is an abundant number, since it is smaller than the sum of its proper divisors (1091908624).

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

824081840 is a wasteful number, since it uses less digits than its factorization.

824081840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10301036 (or 10301030 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 35.

The square root of 824081840 is about 28706.8256691680. The cubic root of 824081840 is about 937.5406664434.

It can be divided in two parts, 82408 and 1840, that added together give a palindrome (84248).

The spelling of 824081840 in words is "eight hundred twenty-four million, eighty-one thousand, eight hundred forty".