28779630 has 32 divisors (see below), whose sum is σ = 75351168. Its totient is φ = 6976800.

The previous prime is 28779613. The next prime is 28779671. The reversal of 28779630 is 3697782.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43276 + ... + 43935.

It is an arithmetic number, because the mean of its divisors is an integer number (2354724).

Almost surely, 2^28779630 is an apocalyptic number.

28779630 is an abundant number, since it is smaller than the sum of its proper divisors (46571538).

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

28779630 is a wasteful number, since it uses less digits than its factorization.

28779630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87232.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 28779630 is about 5364.6649475992. The cubic root of 28779630 is about 306.4514886760.

The spelling of 28779630 in words is "twenty-eight million, seven hundred seventy-nine thousand, six hundred thirty".