3728977686 has 48 divisors (see below), whose sum is σ = 9344934144. Its totient is φ = 1052582832.

The previous prime is 3728977669. The next prime is 3728977687. The reversal of 3728977686 is 6867798273.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3728977687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167826 + ... + 188741.

It is an arithmetic number, because the mean of its divisors is an integer number (194686128).

Almost surely, 2^3728977686 is an apocalyptic number.

3728977686 is an abundant number, since it is smaller than the sum of its proper divisors (5615956458).

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

3728977686 is a wasteful number, since it uses less digits than its factorization.

3728977686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356665 (or 356662 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The square root of 3728977686 is about 61065.3558574745. The cubic root of 3728977686 is about 1550.7076457995.

The spelling of 3728977686 in words is "three billion, seven hundred twenty-eight million, nine hundred seventy-seven thousand, six hundred eighty-six".