27917990 has 8 divisors (see below), whose sum is σ = 50252400. Its totient is φ = 11167192.

The previous prime is 27917987. The next prime is 27917993. The reversal of 27917990 is 9971972.

It is an interprime number because it is at equal distance from previous prime (27917987) and next prime (27917993).

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27917993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395890 + ... + 1395909.

It is an arithmetic number, because the mean of its divisors is an integer number (6281550).

Almost surely, 2^27917990 is an apocalyptic number.

27917990 is a deficient number, since it is larger than the sum of its proper divisors (22334410).

27917990 is a wasteful number, since it uses less digits than its factorization.

27917990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791806.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 27917990 is about 5283.7477229709. The cubic root of 27917990 is about 303.3621422007.

The spelling of 27917990 in words is "twenty-seven million, nine hundred seventeen thousand, nine hundred ninety".