28578370 has 16 divisors (see below), whose sum is σ = 51524928. Its totient is φ = 11412720.

The previous prime is 28578313. The next prime is 28578371. The reversal of 28578370 is 7387582.

It is not an unprimeable number, because it can be changed into a prime (28578371) 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, 5305 + ... + 9235.

It is an arithmetic number, because the mean of its divisors is an integer number (3220308).

Almost surely, 2^28578370 is an apocalyptic number.

28578370 is a deficient number, since it is larger than the sum of its proper divisors (22946558).

28578370 is a wasteful number, since it uses less digits than its factorization.

28578370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28578370 is about 5345.8741100030. The cubic root of 28578370 is about 305.7354642004.

The spelling of 28578370 in words is "twenty-eight million, five hundred seventy-eight thousand, three hundred seventy".