28372398 has 8 divisors (see below), whose sum is σ = 56744808. Its totient is φ = 9457464.

The previous prime is 28372397. The next prime is 28372417. The reversal of 28372398 is 89327382.

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

28372398 is an admirable number.

It is a super-4 number, since 4×28372398⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372397) 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, 2364361 + ... + 2364372.

It is an arithmetic number, because the mean of its divisors is an integer number (7093101).

Almost surely, 2^28372398 is an apocalyptic number.

28372398 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.

28372398 is a wasteful number, since it uses less digits than its factorization.

28372398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728738.

The product of its digits is 145152, while the sum is 42.

The square root of 28372398 is about 5326.5746967446. The cubic root of 28372398 is about 304.9991865964. Note that the first 3 decimals are identical.

The spelling of 28372398 in words is "twenty-eight million, three hundred seventy-two thousand, three hundred ninety-eight".