4020996840 has 96 divisors (see below), whose sum is σ = 14032478880. Its totient is φ = 919083648.

The previous prime is 4020996821. The next prime is 4020996857. The reversal of 4020996840 is 486990204.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 4020996792 and 4020996801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336042 + ... + 347801.

It is an arithmetic number, because the mean of its divisors is an integer number (146171655).

Almost surely, 2^4020996840 is an apocalyptic number.

4020996840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4020996840 is an abundant number, since it is smaller than the sum of its proper divisors (10011482040).

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

4020996840 is a wasteful number, since it uses less digits than its factorization.

4020996840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683871 (or 683860 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 4020996840 is about 63411.3305332730. The cubic root of 4020996840 is about 1590.1737399641.

The spelling of 4020996840 in words is "four billion, twenty million, nine hundred ninety-six thousand, eight hundred forty".