28079394 has 32 divisors (see below), whose sum is σ = 64444416. Its totient is φ = 7989840.

The previous prime is 28079371. The next prime is 28079399. The reversal of 28079394 is 49397082.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28079399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10149 + ... + 12615.

It is an arithmetic number, because the mean of its divisors is an integer number (2013888).

Almost surely, 2^28079394 is an apocalyptic number.

28079394 is an abundant number, since it is smaller than the sum of its proper divisors (36365022).

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

28079394 is a wasteful number, since it uses less digits than its factorization.

28079394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 28079394 is about 5298.9993394980. Note that the first 3 decimals coincide. The cubic root of 28079394 is about 303.9456346111.

The spelling of 28079394 in words is "twenty-eight million, seventy-nine thousand, three hundred ninety-four".