16428878 has 4 divisors (see below), whose sum is σ = 24643320. Its totient is φ = 8214438.

The previous prime is 16428871. The next prime is 16428913. The reversal of 16428878 is 87882461.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4107218 + ... + 4107221.

It is an arithmetic number, because the mean of its divisors is an integer number (6160830).

Almost surely, 2^16428878 is an apocalyptic number.

16428878 is a deficient number, since it is larger than the sum of its proper divisors (8214442).

16428878 is an equidigital number, since it uses as much as digits as its factorization.

16428878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8214441.

The product of its digits is 172032, while the sum is 44.

The square root of 16428878 is about 4053.2552349932. The cubic root of 16428878 is about 254.2158559400.

The spelling of 16428878 in words is "sixteen million, four hundred twenty-eight thousand, eight hundred seventy-eight".