28734216 has 64 divisors (see below), whose sum is σ = 86935680. Its totient is φ = 7726080.

The previous prime is 28734193. The next prime is 28734221. The reversal of 28734216 is 61243782.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2175 + ... + 7886.

It is an arithmetic number, because the mean of its divisors is an integer number (1358370).

Almost surely, 2^28734216 is an apocalyptic number.

It is an amenable number.

28734216 is an abundant number, since it is smaller than the sum of its proper divisors (58201464).

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

28734216 is a wasteful number, since it uses less digits than its factorization.

28734216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10094 (or 10090 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 28734216 is about 5360.4305797203. The cubic root of 28734216 is about 306.2902112408.

Adding to 28734216 its reverse (61243782), we get a palindrome (89977998).

The spelling of 28734216 in words is "twenty-eight million, seven hundred thirty-four thousand, two hundred sixteen".