12523890 has 32 divisors (see below), whose sum is σ = 30260160. Its totient is φ = 3317184.

The previous prime is 12523877. The next prime is 12523909. The reversal of 12523890 is 9832521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3381 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (945630).

Almost surely, 2^12523890 is an apocalyptic number.

12523890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12523890 is an abundant number, since it is smaller than the sum of its proper divisors (17736270).

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

12523890 is a wasteful number, since it uses less digits than its factorization.

12523890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 12523890 is about 3538.9108493999. The cubic root of 12523890 is about 232.2271976665.

The spelling of 12523890 in words is "twelve million, five hundred twenty-three thousand, eight hundred ninety".