28934578 has 8 divisors (see below), whose sum is σ = 45954972. Its totient is φ = 13616256.

The previous prime is 28934573. The next prime is 28934579. The reversal of 28934578 is 87543982.

It can be written as a sum of positive squares in 2 ways, for example, as 27846729 + 1087849 = 5277^2 + 1043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28934573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425475 + ... + 425542.

Almost surely, 2^28934578 is an apocalyptic number.

28934578 is a deficient number, since it is larger than the sum of its proper divisors (17020394).

28934578 is a wasteful number, since it uses less digits than its factorization.

28934578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851036.

The product of its digits is 483840, while the sum is 46.

The square root of 28934578 is about 5379.0870972685. The cubic root of 28934578 is about 307.0004774579. Note that the first 3 decimals are identical.

The spelling of 28934578 in words is "twenty-eight million, nine hundred thirty-four thousand, five hundred seventy-eight".