12277440 has 336 divisors, whose sum is σ = 52120800. Its totient is φ = 2709504.

The previous prime is 12277427. The next prime is 12277483. The reversal of 12277440 is 4477221.

It is a happy number.

12277440 is digitally balanced in base 2 and base 4, because in such bases 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 (336).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423346 + ... + 423374.

Almost surely, 2^12277440 is an apocalyptic number.

12277440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12277440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26060400).

12277440 is an abundant number, since it is smaller than the sum of its proper divisors (39843360).

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

12277440 is a wasteful number, since it uses less digits than its factorization.

12277440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 12277440 is about 3503.9178072552. The cubic root of 12277440 is about 230.6938091990.

The spelling of 12277440 in words is "twelve million, two hundred seventy-seven thousand, four hundred forty".