28405334 has 8 divisors (see below), whose sum is σ = 45114408. Its totient is φ = 13367200.

The previous prime is 28405303. The next prime is 28405337. The reversal of 28405334 is 43350482.

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

It is a junction number, because it is equal to n+sod(n) for n = 28405297 and 28405306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28405337) 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, 417692 + ... + 417759.

It is an arithmetic number, because the mean of its divisors is an integer number (5639301).

Almost surely, 2^28405334 is an apocalyptic number.

28405334 is a deficient number, since it is larger than the sum of its proper divisors (16709074).

28405334 is a wasteful number, since it uses less digits than its factorization.

28405334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835470.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 28405334 is about 5329.6654679257. The cubic root of 28405334 is about 305.1171600418.

The spelling of 28405334 in words is "twenty-eight million, four hundred five thousand, three hundred thirty-four".