12347890 has 8 divisors (see below), whose sum is σ = 22226220. Its totient is φ = 4939152.

The previous prime is 12347857. The next prime is 12347897. The reversal of 12347890 is 9874321.

It can be written as a sum of positive squares in 2 ways, for example, as 12299049 + 48841 = 3507^2 + 221^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12347897) 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, 617385 + ... + 617404.

Almost surely, 2^12347890 is an apocalyptic number.

12347890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12347890 is a deficient number, since it is larger than the sum of its proper divisors (9878330).

12347890 is a wasteful number, since it uses less digits than its factorization.

12347890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234796.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 12347890 is about 3513.9564596050. The cubic root of 12347890 is about 231.1342210789.

The spelling of 12347890 in words is "twelve million, three hundred forty-seven thousand, eight hundred ninety".