12290860 has 12 divisors (see below), whose sum is σ = 25810848. Its totient is φ = 4916336.

The previous prime is 12290851. The next prime is 12290893. The reversal of 12290860 is 6809221.

12290860 = T₂₈₆₁ + T₂₈₆₂ + T₂₈₆₃.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307252 + ... + 307291.

It is an arithmetic number, because the mean of its divisors is an integer number (2150904).

Almost surely, 2^12290860 is an apocalyptic number.

12290860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12290860 is the 2863-rd centered triangular number.

It is an amenable number.

12290860 is an abundant number, since it is smaller than the sum of its proper divisors (13519988).

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

12290860 is a wasteful number, since it uses less digits than its factorization.

12290860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614552 (or 614550 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 12290860 is about 3505.8322834956. The cubic root of 12290860 is about 230.7778327848. Note that the first 3 decimals are identical.

The spelling of 12290860 in words is "twelve million, two hundred ninety thousand, eight hundred sixty".