28787078 has 8 divisors (see below), whose sum is σ = 43626072. Its totient is φ = 14245056.

The previous prime is 28787051. The next prime is 28787117. The reversal of 28787078 is 87078782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74000 + ... + 74387.

It is an arithmetic number, because the mean of its divisors is an integer number (5453259).

Almost surely, 2^28787078 is an apocalyptic number.

28787078 is a deficient number, since it is larger than the sum of its proper divisors (14838994).

28787078 is a wasteful number, since it uses less digits than its factorization.

28787078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148486.

The product of its (nonzero) digits is 351232, while the sum is 47.

The square root of 28787078 is about 5365.3590746566. The cubic root of 28787078 is about 306.4779223471.

The spelling of 28787078 in words is "twenty-eight million, seven hundred eighty-seven thousand, seventy-eight".