28207736 has 16 divisors (see below), whose sum is σ = 53114400. Its totient is φ = 14043904.

The previous prime is 28207733. The next prime is 28207747. The reversal of 28207736 is 63770282.

It is a junction number, because it is equal to n+sod(n) for n = 28207696 and 28207705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28207733) 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, 5465 + ... + 9288.

It is an arithmetic number, because the mean of its divisors is an integer number (3319650).

Almost surely, 2^28207736 is an apocalyptic number.

It is an amenable number.

28207736 is a deficient number, since it is larger than the sum of its proper divisors (24906664).

28207736 is a wasteful number, since it uses less digits than its factorization.

28207736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14998 (or 14994 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28207736 is about 5311.0955555328. The cubic root of 28207736 is about 304.4080105503.

The spelling of 28207736 in words is "twenty-eight million, two hundred seven thousand, seven hundred thirty-six".