28770516 has 36 divisors (see below), whose sum is σ = 75889632. Its totient is φ = 9172944.

The previous prime is 28770509. The next prime is 28770517. The reversal of 28770516 is 61507782.

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 not an unprimeable number, because it can be changed into a prime (28770517) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 16546 + ... + 18201.

Almost surely, 2^28770516 is an apocalyptic number.

It is an amenable number.

28770516 is an abundant number, since it is smaller than the sum of its proper divisors (47119116).

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

28770516 is a wasteful number, since it uses less digits than its factorization.

28770516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34780 (or 34775 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 28770516 is about 5363.8154330663. The cubic root of 28770516 is about 306.4191360044.

The spelling of 28770516 in words is "twenty-eight million, seven hundred seventy thousand, five hundred sixteen".