12857340 has 48 divisors (see below), whose sum is σ = 36156960. Its totient is φ = 3413760.

The previous prime is 12857333. The next prime is 12857347. The reversal of 12857340 is 4375821.

It is an interprime number because it is at equal distance from previous prime (12857333) and next prime (12857347).

It is a super-2 number, since 2×12857340² = 330622383751200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 12857298 and 12857307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857347) 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, 25006 + ... + 25514.

It is an arithmetic number, because the mean of its divisors is an integer number (753270).

Almost surely, 2^12857340 is an apocalyptic number.

12857340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12857340 is an abundant number, since it is smaller than the sum of its proper divisors (23299620).

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

12857340 is a wasteful number, since it uses less digits than its factorization.

12857340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 12857340 is about 3585.7133181558. The cubic root of 12857340 is about 234.2701970545.

The spelling of 12857340 in words is "twelve million, eight hundred fifty-seven thousand, three hundred forty".