1227493440 has 560 divisors, whose sum is σ = 4779751680. Its totient is φ = 298045440.

The previous prime is 1227493433. The next prime is 1227493441. The reversal of 1227493440 is 443947221.

1227493440 is a `hidden beast` number, since 122 + 7 + 4 + 93 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1227493395 and 1227493404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227493441) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 17288605 + ... + 17288675.

Almost surely, 2^1227493440 is an apocalyptic number.

1227493440 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 1227493440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389875840).

1227493440 is an abundant number, since it is smaller than the sum of its proper divisors (3552258240).

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

1227493440 is a wasteful number, since it uses less digits than its factorization.

1227493440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1227493440 is about 35035.6024637796. The cubic root of 1227493440 is about 1070.7129612340.

The spelling of 1227493440 in words is "one billion, two hundred twenty-seven million, four hundred ninety-three thousand, four hundred forty".