3720672021 has 8 divisors (see below), whose sum is σ = 5411886624. Its totient is φ = 2254952720.

The previous prime is 3720671989. The next prime is 3720672023. The reversal of 3720672021 is 1202760273.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3720672021 - 2⁵ = 3720671989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3720672021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3720672023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56373786 + ... + 56373851.

It is an arithmetic number, because the mean of its divisors is an integer number (676485828).

Almost surely, 2^3720672021 is an apocalyptic number.

It is an amenable number.

3720672021 is a deficient number, since it is larger than the sum of its proper divisors (1691214603).

3720672021 is a wasteful number, since it uses less digits than its factorization.

3720672021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112747651.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 3720672021 is about 60997.3115882987. The cubic root of 3720672021 is about 1549.5554772453. Note that the first 3 decimals are identical.

The spelling of 3720672021 in words is "three billion, seven hundred twenty million, six hundred seventy-two thousand, twenty-one".