28474078 has 4 divisors (see below), whose sum is σ = 42711120. Its totient is φ = 14237038.

The previous prime is 28474013. The next prime is 28474087. The reversal of 28474078 is 87047482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87047482 = 2 ⋅43523741.

It is a self number, because there is not a number n which added to its sum of digits gives 28474078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7118518 + ... + 7118521.

It is an arithmetic number, because the mean of its divisors is an integer number (10677780).

Almost surely, 2^28474078 is an apocalyptic number.

28474078 is a deficient number, since it is larger than the sum of its proper divisors (14237042).

28474078 is a wasteful number, since it uses less digits than its factorization.

28474078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14237041.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 28474078 is about 5336.1107559720. The cubic root of 28474078 is about 305.3631006597.

The spelling of 28474078 in words is "twenty-eight million, four hundred seventy-four thousand, seventy-eight".