28634518 has 16 divisors (see below), whose sum is σ = 47290320. Its totient is φ = 12895200.

The previous prime is 28634509. The next prime is 28634519. The reversal of 28634518 is 81543682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28634519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3573 + ... + 8368.

It is an arithmetic number, because the mean of its divisors is an integer number (2955645).

Almost surely, 2^28634518 is an apocalyptic number.

28634518 is a deficient number, since it is larger than the sum of its proper divisors (18655802).

28634518 is a wasteful number, since it uses less digits than its factorization.

28634518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12063.

The product of its digits is 46080, while the sum is 37.

The square root of 28634518 is about 5351.1230596950. The cubic root of 28634518 is about 305.9355596431.

It can be divided in two parts, 2863 and 4518, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 28634518 in words is "twenty-eight million, six hundred thirty-four thousand, five hundred eighteen".