28977430 has 16 divisors (see below), whose sum is σ = 52290864. Its totient is φ = 11561760.

The previous prime is 28977391. The next prime is 28977439. The reversal of 28977430 is 3477982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977439) 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, 769 + ... + 7651.

It is an arithmetic number, because the mean of its divisors is an integer number (3268179).

Almost surely, 2^28977430 is an apocalyptic number.

28977430 is a deficient number, since it is larger than the sum of its proper divisors (23313434).

28977430 is a wasteful number, since it uses less digits than its factorization.

28977430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 28977430 is about 5383.0688273512. The cubic root of 28977430 is about 307.1519582150.

The spelling of 28977430 in words is "twenty-eight million, nine hundred seventy-seven thousand, four hundred thirty".