3220236840 has 64 divisors (see below), whose sum is σ = 9674049600. Its totient is φ = 857544192.

The previous prime is 3220236839. The next prime is 3220236841. The reversal of 3220236840 is 486320223.

It is an interprime number because it is at equal distance from previous prime (3220236839) and next prime (3220236841).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3220236798 and 3220236807.

It is not an unprimeable number, because it can be changed into a prime (3220236841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70524 + ... + 106836.

It is an arithmetic number, because the mean of its divisors is an integer number (151157025).

Almost surely, 2^3220236840 is an apocalyptic number.

3220236840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3220236840 is an abundant number, since it is smaller than the sum of its proper divisors (6453812760).

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

3220236840 is a wasteful number, since it uses less digits than its factorization.

3220236840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37066 (or 37062 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 3220236840 is about 56747.1306763611. The cubic root of 3220236840 is about 1476.7124556005.

The spelling of 3220236840 in words is "three billion, two hundred twenty million, two hundred thirty-six thousand, eight hundred forty".