214731728 has 20 divisors (see below), whose sum is σ = 417586368. Its totient is φ = 106967520.

The previous prime is 214731691. The next prime is 214731731. The reversal of 214731728 is 827137412.

It is a super-2 number, since 2×214731728² = 92219430019731968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20426 + ... + 29097.

Almost surely, 2^214731728 is an apocalyptic number.

It is an amenable number.

214731728 is a deficient number, since it is larger than the sum of its proper divisors (202854640).

214731728 is a wasteful number, since it uses less digits than its factorization.

214731728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49802 (or 49796 counting only the distinct ones).

The product of its digits is 18816, while the sum is 35.

The square root of 214731728 is about 14653.7274438963. The cubic root of 214731728 is about 598.8233681449.

The spelling of 214731728 in words is "two hundred fourteen million, seven hundred thirty-one thousand, seven hundred twenty-eight".