28749078 has 12 divisors (see below), whose sum is σ = 62289708. Its totient is φ = 9583020.

The previous prime is 28749073. The next prime is 28749089. The reversal of 28749078 is 87094782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28749073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 798568 + ... + 798603.

It is an arithmetic number, because the mean of its divisors is an integer number (5190809).

Almost surely, 2^28749078 is an apocalyptic number.

28749078 is an abundant number, since it is smaller than the sum of its proper divisors (33540630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28749078 is a wasteful number, since it uses less digits than its factorization.

28749078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597179 (or 1597176 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28749078 is about 5361.8166697492. The cubic root of 28749078 is about 306.3430089290.

The spelling of 28749078 in words is "twenty-eight million, seven hundred forty-nine thousand, seventy-eight".