26887978 has 16 divisors (see below), whose sum is σ = 43626240. Its totient is φ = 12355056.

The previous prime is 26887963. The next prime is 26887979. The reversal of 26887978 is 87978862.

It is not an unprimeable number, because it can be changed into a prime (26887979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051 + ... + 8377.

It is an arithmetic number, because the mean of its divisors is an integer number (2726640).

Almost surely, 2^26887978 is an apocalyptic number.

26887978 is a deficient number, since it is larger than the sum of its proper divisors (16738262).

26887978 is a wasteful number, since it uses less digits than its factorization.

26887978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581.

The product of its digits is 2709504, while the sum is 55.

The square root of 26887978 is about 5185.3618967243. The cubic root of 26887978 is about 299.5845285810.

The spelling of 26887978 in words is "twenty-six million, eight hundred eighty-seven thousand, nine hundred seventy-eight".