1244436880 has 40 divisors (see below), whose sum is σ = 2934080064. Its totient is φ = 490761600.

The previous prime is 1244436859. The next prime is 1244436883. The reversal of 1244436880 is 886344421.

It is a happy number.

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 (40).

It is not an unprimeable number, because it can be changed into a prime (1244436883) 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, 103866 + ... + 115225.

Almost surely, 2^1244436880 is an apocalyptic number.

1244436880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244436880 is an abundant number, since it is smaller than the sum of its proper divisors (1689643184).

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

1244436880 is a wasteful number, since it uses less digits than its factorization.

1244436880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219175 (or 219169 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 1244436880 is about 35276.5769314428. The cubic root of 1244436880 is about 1075.6169179361.

The spelling of 1244436880 in words is "one billion, two hundred forty-four million, four hundred thirty-six thousand, eight hundred eighty".