28937091 has 8 divisors (see below), whose sum is σ = 38649600. Its totient is φ = 19257992.

The previous prime is 28937089. The next prime is 28937093. The reversal of 28937091 is 19073982.

It is an interprime number because it is at equal distance from previous prime (28937089) and next prime (28937093).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28937091 - 2¹ = 28937089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28937093) by changing a digit.

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, 6255 + ... + 9848.

It is an arithmetic number, because the mean of its divisors is an integer number (4831200).

Almost surely, 2^28937091 is an apocalyptic number.

28937091 is a deficient number, since it is larger than the sum of its proper divisors (9712509).

28937091 is a wasteful number, since it uses less digits than its factorization.

28937091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16705.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 28937091 is about 5379.3206820192. The cubic root of 28937091 is about 307.0093649773.

The spelling of 28937091 in words is "twenty-eight million, nine hundred thirty-seven thousand, ninety-one".