3722724628 has 18 divisors (see below), whose sum is σ = 7578404106. Its totient is φ = 1595453328.

The previous prime is 3722724569. The next prime is 3722724659. The reversal of 3722724628 is 8264272273.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3535253764 + 187470864 = 59458^2 + 13692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9496551 + ... + 9496942.

Almost surely, 2^3722724628 is an apocalyptic number.

It is an amenable number.

3722724628 is an abundant number, since it is smaller than the sum of its proper divisors (3855679478).

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

3722724628 is a wasteful number, since it uses less digits than its factorization.

3722724628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18993511 (or 18993502 counting only the distinct ones).

The product of its digits is 451584, while the sum is 43.

The square root of 3722724628 is about 61014.1346574710. The cubic root of 3722724628 is about 1549.8403759310.

The spelling of 3722724628 in words is "three billion, seven hundred twenty-two million, seven hundred twenty-four thousand, six hundred twenty-eight".