28977012 has 36 divisors (see below), whose sum is σ = 74954880. Its totient is φ = 9433872.

The previous prime is 28976977. The next prime is 28977023. The reversal of 28977012 is 21077982.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7812 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (2082080).

Almost surely, 2^28977012 is an apocalyptic number.

It is an amenable number.

28977012 is an abundant number, since it is smaller than the sum of its proper divisors (45977868).

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

28977012 is a wasteful number, since it uses less digits than its factorization.

28977012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772 (or 18767 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28977012 is about 5383.0300017741. The cubic root of 28977012 is about 307.1504813168.

The spelling of 28977012 in words is "twenty-eight million, nine hundred seventy-seven thousand, twelve".