1244377136 has 40 divisors (see below), whose sum is σ = 2443251360. Its totient is φ = 613910016.

The previous prime is 1244377117. The next prime is 1244377139. The reversal of 1244377136 is 6317734421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244377136.

It is not an unprimeable number, because it can be changed into a prime (1244377139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457316 + ... + 460028.

It is an arithmetic number, because the mean of its divisors is an integer number (61081284).

Almost surely, 2^1244377136 is an apocalyptic number.

1244377136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1244377136 is a deficient number, since it is larger than the sum of its proper divisors (1198874224).

1244377136 is a wasteful number, since it uses less digits than its factorization.

1244377136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093 (or 3087 counting only the distinct ones).

The product of its digits is 84672, while the sum is 38.

The square root of 1244377136 is about 35275.7301271001. The cubic root of 1244377136 is about 1075.5997046121.

The spelling of 1244377136 in words is "one billion, two hundred forty-four million, three hundred seventy-seven thousand, one hundred thirty-six".