28977912 has 80 divisors (see below), whose sum is σ = 81936360. Its totient is φ = 9567936.

The previous prime is 28977899. The next prime is 28977929. The reversal of 28977912 is 21977982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 127543 + ... + 127769.

Almost surely, 2^28977912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28977912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40968180).

28977912 is an abundant number, since it is smaller than the sum of its proper divisors (52958448).

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

28977912 is a wasteful number, since it uses less digits than its factorization.

28977912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 429 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 28977912 is about 5383.1135971666. The cubic root of 28977912 is about 307.1536612234.

The spelling of 28977912 in words is "twenty-eight million, nine hundred seventy-seven thousand, nine hundred twelve".