28736394 has 8 divisors (see below), whose sum is σ = 57472800. Its totient is φ = 9578796.

The previous prime is 28736387. The next prime is 28736399. The reversal of 28736394 is 49363782.

It is a sphenic number, since it is the product of 3 distinct primes.

28736394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28736399) 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, 2394694 + ... + 2394705.

It is an arithmetic number, because the mean of its divisors is an integer number (7184100).

Almost surely, 2^28736394 is an apocalyptic number.

28736394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28736394 is a wasteful number, since it uses less digits than its factorization.

28736394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789404.

The product of its digits is 217728, while the sum is 42.

The square root of 28736394 is about 5360.6337311926. The cubic root of 28736394 is about 306.2979497876.

The spelling of 28736394 in words is "twenty-eight million, seven hundred thirty-six thousand, three hundred ninety-four".