28907918 has 16 divisors (see below), whose sum is σ = 48728736. Its totient is φ = 12761760.

The previous prime is 28907897. The next prime is 28907933. The reversal of 28907918 is 81970982.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23573 + ... + 24768.

It is an arithmetic number, because the mean of its divisors is an integer number (3045546).

Almost surely, 2^28907918 is an apocalyptic number.

28907918 is a deficient number, since it is larger than the sum of its proper divisors (19820818).

28907918 is a wasteful number, since it uses less digits than its factorization.

28907918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48379.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 28907918 is about 5376.6084105131. The cubic root of 28907918 is about 306.9061595365.

The spelling of 28907918 in words is "twenty-eight million, nine hundred seven thousand, nine hundred eighteen".