3728689970 has 8 divisors (see below), whose sum is σ = 6711641964. Its totient is φ = 1491475984.

The previous prime is 3728689931. The next prime is 3728689997. The reversal of 3728689970 is 799868273.

It is a Cunningham number, because it is equal to 61063²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 3728689969 + 1 = 61063^2 + 1^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186434489 + ... + 186434508.

Almost surely, 2^3728689970 is an apocalyptic number.

3728689970 is a deficient number, since it is larger than the sum of its proper divisors (2982951994).

3728689970 is a wasteful number, since it uses less digits than its factorization.

3728689970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372869004.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The square root of 3728689970 is about 61063.0000081883. Note that the first 5 decimals coincide. The cubic root of 3728689970 is about 1550.6677622251.

The spelling of 3728689970 in words is "three billion, seven hundred twenty-eight million, six hundred eighty-nine thousand, nine hundred seventy".