28997922 has 8 divisors (see below), whose sum is σ = 57995856. Its totient is φ = 9665972.

The previous prime is 28997921. The next prime is 28997923. The reversal of 28997922 is 22979982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28997921) and next prime (28997923).

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

28997922 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28997921) 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 3 ways as a sum of consecutive naturals, for example, 2416488 + ... + 2416499.

It is an arithmetic number, because the mean of its divisors is an integer number (7249482).

Almost surely, 2^28997922 is an apocalyptic number.

28997922 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.

28997922 is a wasteful number, since it uses less digits than its factorization.

28997922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832992.

The product of its digits is 326592, while the sum is 48.

The square root of 28997922 is about 5384.9718662218. The cubic root of 28997922 is about 307.2243441469.

The spelling of 28997922 in words is "twenty-eight million, nine hundred ninety-seven thousand, nine hundred twenty-two".