28151304 has 32 divisors (see below), whose sum is σ = 70509120. Its totient is φ = 9366336.

The previous prime is 28151281. The next prime is 28151311. The reversal of 28151304 is 40315182.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22602 + ... + 23814.

It is an arithmetic number, because the mean of its divisors is an integer number (2203410).

Almost surely, 2^28151304 is an apocalyptic number.

28151304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28151304 is an abundant number, since it is smaller than the sum of its proper divisors (42357816).

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

28151304 is a wasteful number, since it uses less digits than its factorization.

28151304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28151304 is about 5305.7802442242. The cubic root of 28151304 is about 304.2048768994.

Adding to 28151304 its reverse (40315182), we get a palindrome (68466486).

The spelling of 28151304 in words is "twenty-eight million, one hundred fifty-one thousand, three hundred four".