28641506 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 14127888.

The previous prime is 28641461. The next prime is 28641511. The reversal of 28641506 is 60514682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74591 + ... + 74973.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28641506 is an apocalyptic number.

28641506 is a deficient number, since it is larger than the sum of its proper divisors (14904094).

28641506 is a wasteful number, since it uses less digits than its factorization.

28641506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28641506 is about 5351.7759669104. The cubic root of 28641506 is about 305.9604445716.

The spelling of 28641506 in words is "twenty-eight million, six hundred forty-one thousand, five hundred six".