28945837 has 8 divisors (see below), whose sum is σ = 29997440. Its totient is φ = 27911520.

The previous prime is 28945831. The next prime is 28945853. The reversal of 28945837 is 73854982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28945837 is a prime.

It is a super-2 number, since 2×28945837² = 1675722959261138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28945831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (3749680).

Almost surely, 2^28945837 is an apocalyptic number.

It is an amenable number.

28945837 is a deficient number, since it is larger than the sum of its proper divisors (1051603).

28945837 is an equidigital number, since it uses as much as digits as its factorization.

28945837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8643.

The product of its digits is 483840, while the sum is 46.

The square root of 28945837 is about 5380.1335485283. The cubic root of 28945837 is about 307.0402922214.

The spelling of 28945837 in words is "twenty-eight million, nine hundred forty-five thousand, eight hundred thirty-seven".