347487728 has 40 divisors (see below), whose sum is σ = 780938112. Its totient is φ = 146697408.

The previous prime is 347487727. The next prime is 347487737. The reversal of 347487728 is 827784743.

It is a happy number.

It is a super-2 number, since 2×347487728² = 241495442221203968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347487727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15650 + ... + 30657.

Almost surely, 2^347487728 is an apocalyptic number.

It is an amenable number.

347487728 is an abundant number, since it is smaller than the sum of its proper divisors (433450384).

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

347487728 is a wasteful number, since it uses less digits than its factorization.

347487728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46389 (or 46383 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 50.

The square root of 347487728 is about 18641.0227187244. The cubic root of 347487728 is about 703.0396577717.

The spelling of 347487728 in words is "three hundred forty-seven million, four hundred eighty-seven thousand, seven hundred twenty-eight".