3728686745 has 32 divisors (see below), whose sum is σ = 5519992320. Its totient is φ = 2361300480.

The previous prime is 3728686631. The next prime is 3728686781. The reversal of 3728686745 is 5476868273.

It is not a de Polignac number, because 3728686745 - 2¹⁶ = 3728621209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56516 + ... + 103205.

It is an arithmetic number, because the mean of its divisors is an integer number (172499760).

Almost surely, 2^3728686745 is an apocalyptic number.

3728686745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3728686745 is a deficient number, since it is larger than the sum of its proper divisors (1791305575).

3728686745 is a wasteful number, since it uses less digits than its factorization.

3728686745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159785.

The product of its digits is 13547520, while the sum is 56.

The square root of 3728686745 is about 61062.9736010293. The cubic root of 3728686745 is about 1550.6673151597.

The spelling of 3728686745 in words is "three billion, seven hundred twenty-eight million, six hundred eighty-six thousand, seven hundred forty-five".