28346438 has 4 divisors (see below), whose sum is σ = 42519660. Its totient is φ = 14173218.

The previous prime is 28346401. The next prime is 28346443. The reversal of 28346438 is 83464382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83464382 = 2 ⋅41732191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7086608 + ... + 7086611.

It is an arithmetic number, because the mean of its divisors is an integer number (10629915).

Almost surely, 2^28346438 is an apocalyptic number.

28346438 is a deficient number, since it is larger than the sum of its proper divisors (14173222).

28346438 is a wasteful number, since it uses less digits than its factorization.

28346438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14173221.

The product of its digits is 110592, while the sum is 38.

The square root of 28346438 is about 5324.1373010094. The cubic root of 28346438 is about 304.9061361257.

The spelling of 28346438 in words is "twenty-eight million, three hundred forty-six thousand, four hundred thirty-eight".