27987832890 has 48 divisors (see below), whose sum is σ = 72792720000. Its totient is φ = 7460924256.

The previous prime is 27987832879. The next prime is 27987832897. The reversal of 27987832890 is 9823878972.

It is a happy number.

27987832890 is a `hidden beast` number, since 279 + 8 + 7 + 83 + 289 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (27987832897) 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, 226611 + ... + 327609.

It is an arithmetic number, because the mean of its divisors is an integer number (1516515000).

Almost surely, 2^27987832890 is an apocalyptic number.

27987832890 is an abundant number, since it is smaller than the sum of its proper divisors (44804887110).

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

27987832890 is a wasteful number, since it uses less digits than its factorization.

27987832890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104091 (or 104088 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 27987832890 in words is "twenty-seven billion, nine hundred eighty-seven million, eight hundred thirty-two thousand, eight hundred ninety".