28940086 has 48 divisors (see below), whose sum is σ = 55404000. Its totient is φ = 11251968.

The previous prime is 28940083. The next prime is 28940089. The reversal of 28940086 is 68004982.

It is an interprime number because it is at equal distance from previous prime (28940083) and next prime (28940089).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28940083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48015 + ... + 48613.

It is an arithmetic number, because the mean of its divisors is an integer number (1154250).

Almost surely, 2^28940086 is an apocalyptic number.

28940086 is a deficient number, since it is larger than the sum of its proper divisors (26463914).

28940086 is a wasteful number, since it uses less digits than its factorization.

28940086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 28940086 is about 5379.5990556918. The cubic root of 28940086 is about 307.0199564741.

The spelling of 28940086 in words is "twenty-eight million, nine hundred forty thousand, eighty-six".