12355440 has 40 divisors (see below), whose sum is σ = 38302608. Its totient is φ = 3294720.

The previous prime is 12355433. The next prime is 12355451. The reversal of 12355440 is 4455321.

12355440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12355440.

It is a congruent number.

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, 25501 + ... + 25980.

Almost surely, 2^12355440 is an apocalyptic number.

12355440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12355440 is an abundant number, since it is smaller than the sum of its proper divisors (25947168).

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

12355440 is a wasteful number, since it uses less digits than its factorization.

12355440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51497 (or 51491 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 12355440 is about 3515.0305830817. The cubic root of 12355440 is about 231.1813197552.

The spelling of 12355440 in words is "twelve million, three hundred fifty-five thousand, four hundred forty".