28667012 has 24 divisors (see below), whose sum is σ = 55248480. Its totient is φ = 12906560.

The previous prime is 28666987. The next prime is 28667017. The reversal of 28667012 is 21076682.

It is a self number, because there is not a number n which added to its sum of digits gives 28667012.

It is not an unprimeable number, because it can be changed into a prime (28667017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1664 + ... + 7752.

It is an arithmetic number, because the mean of its divisors is an integer number (2302020).

Almost surely, 2^28667012 is an apocalyptic number.

28667012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28667012 is a deficient number, since it is larger than the sum of its proper divisors (26581468).

28667012 is a wasteful number, since it uses less digits than its factorization.

28667012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211 (or 6209 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 28667012 is about 5354.1583839106. The cubic root of 28667012 is about 306.0512395150.

It can be divided in two parts, 286670 and 12, that added together give a palindrome (286682).

The spelling of 28667012 in words is "twenty-eight million, six hundred sixty-seven thousand, twelve".