28046578 has 16 divisors (see below), whose sum is σ = 49199040. Its totient is φ = 11740176.

The previous prime is 28046573. The next prime is 28046581. The reversal of 28046578 is 87564082.

It is a super-2 number, since 2×28046578² = 1573221075020168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28046578.

It is not an unprimeable number, because it can be changed into a prime (28046573) 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, 22693 + ... + 23896.

It is an arithmetic number, because the mean of its divisors is an integer number (3074940).

Almost surely, 2^28046578 is an apocalyptic number.

28046578 is a deficient number, since it is larger than the sum of its proper divisors (21152462).

28046578 is a wasteful number, since it uses less digits than its factorization.

28046578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46641.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28046578 is about 5295.9020006039. The cubic root of 28046578 is about 303.8271827662.

The spelling of 28046578 in words is "twenty-eight million, forty-six thousand, five hundred seventy-eight".