12728370 has 32 divisors (see below), whose sum is σ = 31376448. Its totient is φ = 3302208.

The previous prime is 12728363. The next prime is 12728371. The reversal of 12728370 is 7382721.

It is a super-2 number, since 2×12728370² = 324022805713800, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12728371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4624 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (980514).

Almost surely, 2^12728370 is an apocalyptic number.

12728370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12728370 is an abundant number, since it is smaller than the sum of its proper divisors (18648078).

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

12728370 is a wasteful number, since it uses less digits than its factorization.

12728370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11514.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 12728370 is about 3567.6841227889. The cubic root of 12728370 is about 233.4842538372.

The spelling of 12728370 in words is "twelve million, seven hundred twenty-eight thousand, three hundred seventy".