3621978772 has 12 divisors (see below), whose sum is σ = 6338908800. Its totient is φ = 1810861976.

The previous prime is 3621978757. The next prime is 3621978779. The reversal of 3621978772 is 2778791263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621978779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64479 + ... + 106777.

It is an arithmetic number, because the mean of its divisors is an integer number (528242400).

Almost surely, 2^3621978772 is an apocalyptic number.

It is an amenable number.

3621978772 is a deficient number, since it is larger than the sum of its proper divisors (2716930028).

3621978772 is a wasteful number, since it uses less digits than its factorization.

3621978772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63710 (or 63708 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 52.

The square root of 3621978772 is about 60182.8777311288. The cubic root of 3621978772 is about 1535.7315278070.

The spelling of 3621978772 in words is "three billion, six hundred twenty-one million, nine hundred seventy-eight thousand, seven hundred seventy-two".