28232418 has 8 divisors (see below), whose sum is σ = 56464848. Its totient is φ = 9410804.

The previous prime is 28232401. The next prime is 28232419. The reversal of 28232418 is 81423282.

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

28232418 is an admirable number.

It is a super-2 number, since 2×28232418² = 1594138852253448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28232419) 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, 2352696 + ... + 2352707.

It is an arithmetic number, because the mean of its divisors is an integer number (7058106).

Almost surely, 2^28232418 is an apocalyptic number.

28232418 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.

28232418 is a wasteful number, since it uses less digits than its factorization.

28232418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705408.

The product of its digits is 6144, while the sum is 30.

The square root of 28232418 is about 5313.4186735096. The cubic root of 28232418 is about 304.4967711673.

The spelling of 28232418 in words is "twenty-eight million, two hundred thirty-two thousand, four hundred eighteen".