28341978 has 32 divisors (see below), whose sum is σ = 65126400. Its totient is φ = 8054640.

The previous prime is 28341953. The next prime is 28341997. The reversal of 28341978 is 87914382.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 6663 + ... + 10053.

It is an arithmetic number, because the mean of its divisors is an integer number (2035200).

Almost surely, 2^28341978 is an apocalyptic number.

28341978 is an abundant number, since it is smaller than the sum of its proper divisors (36784422).

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

28341978 is a wasteful number, since it uses less digits than its factorization.

28341978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3602.

The product of its digits is 96768, while the sum is 42.

The square root of 28341978 is about 5323.7184373331. The cubic root of 28341978 is about 304.8901440789.

The spelling of 28341978 in words is "twenty-eight million, three hundred forty-one thousand, nine hundred seventy-eight".