12273640 has 32 divisors (see below), whose sum is σ = 28365480. Its totient is φ = 4776192.

The previous prime is 12273631. The next prime is 12273671. The reversal of 12273640 is 4637221.

It can be written as a sum of positive squares in 4 ways, for example, as 10536516 + 1737124 = 3246^2 + 1318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667 + ... + 5626.

Almost surely, 2^12273640 is an apocalyptic number.

12273640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12273640 is an abundant number, since it is smaller than the sum of its proper divisors (16091840).

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

12273640 is a wasteful number, since it uses less digits than its factorization.

12273640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341 (or 8337 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 12273640 is about 3503.3755151282. The cubic root of 12273640 is about 230.6700060030.

The spelling of 12273640 in words is "twelve million, two hundred seventy-three thousand, six hundred forty".