28147974 has 8 divisors (see below), whose sum is σ = 56295960. Its totient is φ = 9382656.

The previous prime is 28147939. The next prime is 28147979. The reversal of 28147974 is 47974182.

It is a happy number.

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

28147974 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28147979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345659 + ... + 2345670.

It is an arithmetic number, because the mean of its divisors is an integer number (7036995).

Almost surely, 2^28147974 is an apocalyptic number.

28147974 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28147974 is a wasteful number, since it uses less digits than its factorization.

28147974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691334.

The product of its digits is 112896, while the sum is 42.

The square root of 28147974 is about 5305.4664262438. The cubic root of 28147974 is about 304.1928816921.

The spelling of 28147974 in words is "twenty-eight million, one hundred forty-seven thousand, nine hundred seventy-four".