3722626821 has 8 divisors (see below), whose sum is σ = 4964201824. Its totient is φ = 2481401520.

The previous prime is 3722626807. The next prime is 3722626837. The reversal of 3722626821 is 1286262273.

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

It is not a de Polignac number, because 3722626821 - 2¹⁵ = 3722594053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3722626821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3722626841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61486 + ... + 105951.

It is an arithmetic number, because the mean of its divisors is an integer number (620525228).

Almost surely, 2^3722626821 is an apocalyptic number.

It is an amenable number.

3722626821 is a deficient number, since it is larger than the sum of its proper divisors (1241575003).

3722626821 is a wasteful number, since it uses less digits than its factorization.

3722626821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174851.

The product of its digits is 96768, while the sum is 39.

The square root of 3722626821 is about 61013.3331412078. Note that the first 3 decimals coincide. The cubic root of 3722626821 is about 1549.8268028468.

The spelling of 3722626821 in words is "three billion, seven hundred twenty-two million, six hundred twenty-six thousand, eight hundred twenty-one".