28770034 has 4 divisors (see below), whose sum is σ = 43155054. Its totient is φ = 14385016.

The previous prime is 28770029. The next prime is 28770037. The reversal of 28770034 is 43007782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43007782 = 2 ⋅21503891.

It can be written as a sum of positive squares in only one way, i.e., 24039409 + 4730625 = 4903^2 + 2175^2 .

It is a super-2 number, since 2×28770034² = 1655429712722312, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28769978 and 28770005.

It is not an unprimeable number, because it can be changed into a prime (28770037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7192507 + ... + 7192510.

Almost surely, 2^28770034 is an apocalyptic number.

28770034 is a deficient number, since it is larger than the sum of its proper divisors (14385020).

28770034 is a wasteful number, since it uses less digits than its factorization.

28770034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14385019.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 28770034 is about 5363.7705021748. The cubic root of 28770034 is about 306.4174248215.

The spelling of 28770034 in words is "twenty-eight million, seven hundred seventy thousand, thirty-four".