3021920784 has 105 divisors (see below), whose sum is σ = 8795721853. Its totient is φ = 1005327936.

The previous prime is 3021920779. The next prime is 3021920807. The reversal of 3021920784 is 4870291203.

The square root of 3021920784 is 54972.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2457383184 + 564537600 = 49572^2 + 23760^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 5936722 + ... + 5937230.

Almost surely, 2^3021920784 is an apocalyptic number.

3021920784 is the 54972-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3021920784

3021920784 is an abundant number, since it is smaller than the sum of its proper divisors (5773801069).

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

3021920784 is an frugal number, since it uses more digits than its factorization.

3021920784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The cubic root of 3021920784 is about 1445.7538535238.

Multiplying 3021920784 by its sum of digits (36), we get a square (108789148224 = 329832²).

3021920784 divided by its sum of digits (36) gives a square (83942244 = 9162²).

The spelling of 3021920784 in words is "three billion, twenty-one million, nine hundred twenty thousand, seven hundred eighty-four".