27978041 has 8 divisors (see below), whose sum is σ = 34434624. Its totient is φ = 22136400.

The previous prime is 27978029. The next prime is 27978043. The reversal of 27978041 is 14087972.

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

It is a de Polignac number, because none of the positive numbers 2^k-27978041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27977986 and 27978004.

It is not an unprimeable number, because it can be changed into a prime (27978043) 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, 153635 + ... + 153816.

It is an arithmetic number, because the mean of its divisors is an integer number (4304328).

Almost surely, 2^27978041 is an apocalyptic number.

It is an amenable number.

27978041 is a deficient number, since it is larger than the sum of its proper divisors (6456583).

27978041 is a wasteful number, since it uses less digits than its factorization.

27978041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307471.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 27978041 is about 5289.4272846878. The cubic root of 27978041 is about 303.5794949302.

The spelling of 27978041 in words is "twenty-seven million, nine hundred seventy-eight thousand, forty-one".