28706396 has 12 divisors (see below), whose sum is σ = 51461760. Its totient is φ = 14003040.

The previous prime is 28706389. The next prime is 28706399. The reversal of 28706396 is 69360782.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706399) 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, 87356 + ... + 87683.

It is an arithmetic number, because the mean of its divisors is an integer number (4288480).

Almost surely, 2^28706396 is an apocalyptic number.

It is an amenable number.

28706396 is a deficient number, since it is larger than the sum of its proper divisors (22755364).

28706396 is a wasteful number, since it uses less digits than its factorization.

28706396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175084 (or 175082 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 28706396 is about 5357.8350105243. The cubic root of 28706396 is about 306.1913309243.

The spelling of 28706396 in words is "twenty-eight million, seven hundred six thousand, three hundred ninety-six".