12789890 has 16 divisors (see below), whose sum is σ = 23158008. Its totient is φ = 5085696.

The previous prime is 12789883. The next prime is 12789893. The reversal of 12789890 is 9898721.

It can be written as a sum of positive squares in 4 ways, for example, as 10764961 + 2024929 = 3281^2 + 1423^2 .

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 (12789893) 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, 1967 + ... + 5426.

Almost surely, 2^12789890 is an apocalyptic number.

12789890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12789890 is a deficient number, since it is larger than the sum of its proper divisors (10368118).

12789890 is a wasteful number, since it uses less digits than its factorization.

12789890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 12789890 is about 3576.2955694405. The cubic root of 12789890 is about 233.8598157116.

The spelling of 12789890 in words is "twelve million, seven hundred eighty-nine thousand, eight hundred ninety".