27978150 has 48 divisors (see below), whose sum is σ = 69709824. Its totient is φ = 7426080.

The previous prime is 27978149. The next prime is 27978157. The reversal of 27978150 is 5187972.

It is a junction number, because it is equal to n+sod(n) for n = 27978099 and 27978108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27978157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57207 + ... + 57693.

It is an arithmetic number, because the mean of its divisors is an integer number (1452288).

Almost surely, 2^27978150 is an apocalyptic number.

27978150 is an abundant number, since it is smaller than the sum of its proper divisors (41731674).

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

27978150 is a wasteful number, since it uses less digits than its factorization.

27978150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 27978150 is about 5289.4375882508. The cubic root of 27978150 is about 303.5798891694.

The spelling of 27978150 in words is "twenty-seven million, nine hundred seventy-eight thousand, one hundred fifty".