27958940 has 24 divisors (see below), whose sum is σ = 58813440. Its totient is φ = 11164608.

The previous prime is 27958919. The next prime is 27958943. The reversal of 27958940 is 4985972.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27958891 and 27958900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27958943) 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, 21221 + ... + 22499.

It is an arithmetic number, because the mean of its divisors is an integer number (2450560).

Almost surely, 2^27958940 is an apocalyptic number.

27958940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27958940 is an abundant number, since it is smaller than the sum of its proper divisors (30854500).

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

27958940 is a wasteful number, since it uses less digits than its factorization.

27958940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 27958940 is about 5287.6213934055. The cubic root of 27958940 is about 303.5103932128.

The spelling of 27958940 in words is "twenty-seven million, nine hundred fifty-eight thousand, nine hundred forty".