28981358 has 16 divisors (see below), whose sum is σ = 49961184. Its totient is φ = 12350880.

The previous prime is 28981349. The next prime is 28981409. The reversal of 28981358 is 85318982.

It is a super-2 number, since 2×28981358² = 1679838223048328, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 8252.

It is an arithmetic number, because the mean of its divisors is an integer number (3122574).

Almost surely, 2^28981358 is an apocalyptic number.

28981358 is a deficient number, since it is larger than the sum of its proper divisors (20979826).

28981358 is a wasteful number, since it uses less digits than its factorization.

28981358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11627.

The product of its digits is 138240, while the sum is 44.

The square root of 28981358 is about 5383.4336626358. The cubic root of 28981358 is about 307.1658361236.

The spelling of 28981358 in words is "twenty-eight million, nine hundred eighty-one thousand, three hundred fifty-eight".