28456078 has 32 divisors (see below), whose sum is σ = 50780160. Its totient is φ = 11702880.

The previous prime is 28456063. The next prime is 28456081. The reversal of 28456078 is 87065482.

It is a self number, because there is not a number n which added to its sum of digits gives 28456078.

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, 74893 + ... + 75271.

It is an arithmetic number, because the mean of its divisors is an integer number (1586880).

Almost surely, 2^28456078 is an apocalyptic number.

28456078 is a deficient number, since it is larger than the sum of its proper divisors (22324082).

28456078 is a wasteful number, since it uses less digits than its factorization.

28456078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

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

The square root of 28456078 is about 5334.4238676731. The cubic root of 28456078 is about 305.2987416026.

The spelling of 28456078 in words is "twenty-eight million, four hundred fifty-six thousand, seventy-eight".