28735386 has 8 divisors (see below), whose sum is σ = 57470784. Its totient is φ = 9578460.

The previous prime is 28735373. The next prime is 28735393. The reversal of 28735386 is 68353782.

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

28735386 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2394610 + ... + 2394621.

It is an arithmetic number, because the mean of its divisors is an integer number (7183848).

Almost surely, 2^28735386 is an apocalyptic number.

28735386 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.

28735386 is a wasteful number, since it uses less digits than its factorization.

28735386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4789236.

The product of its digits is 241920, while the sum is 42.

The square root of 28735386 is about 5360.5397116335. The cubic root of 28735386 is about 306.2943683600.

The spelling of 28735386 in words is "twenty-eight million, seven hundred thirty-five thousand, three hundred eighty-six".