28706736 has 20 divisors (see below), whose sum is σ = 74159192. Its totient is φ = 9568896.

The previous prime is 28706731. The next prime is 28706747. The reversal of 28706736 is 63760782.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28706694 and 28706703.

It is not an unprimeable number, because it can be changed into a prime (28706731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298981 + ... + 299076.

Almost surely, 2^28706736 is an apocalyptic number.

It is an amenable number.

28706736 is an abundant number, since it is smaller than the sum of its proper divisors (45452456).

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

28706736 is a wasteful number, since it uses less digits than its factorization.

28706736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598068 (or 598062 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 28706736 is about 5357.8667396642. The cubic root of 28706736 is about 306.1925397681.

The spelling of 28706736 in words is "twenty-eight million, seven hundred six thousand, seven hundred thirty-six".