3486991728 has 80 divisors (see below), whose sum is σ = 10254272256. Its totient is φ = 1010718720.

The previous prime is 3486991727. The next prime is 3486991757. The reversal of 3486991728 is 8271996843.

It is a super-3 number, since 3×3486991728³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3486991723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131425 + ... + 155712.

Almost surely, 2^3486991728 is an apocalyptic number.

It is an amenable number.

3486991728 is an abundant number, since it is smaller than the sum of its proper divisors (6767280528).

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

3486991728 is a wasteful number, since it uses less digits than its factorization.

3486991728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287182 (or 287176 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The square root of 3486991728 is about 59050.7555243792. The cubic root of 3486991728 is about 1516.4111614885.

The spelling of 3486991728 in words is "three billion, four hundred eighty-six million, nine hundred ninety-one thousand, seven hundred twenty-eight".