1244218728 has 32 divisors (see below), whose sum is σ = 3210888960. Its totient is φ = 401360640.

The previous prime is 1244218699. The next prime is 1244218771. The reversal of 1244218728 is 8278124421.

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, 835425 + ... + 836912.

It is an arithmetic number, because the mean of its divisors is an integer number (100340280).

Almost surely, 2^1244218728 is an apocalyptic number.

It is an amenable number.

1244218728 is an abundant number, since it is smaller than the sum of its proper divisors (1966670232).

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

1244218728 is a wasteful number, since it uses less digits than its factorization.

1244218728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672377 (or 1672373 counting only the distinct ones).

The product of its digits is 57344, while the sum is 39.

The square root of 1244218728 is about 35273.4847725597. The cubic root of 1244218728 is about 1075.5540617430.

The spelling of 1244218728 in words is "one billion, two hundred forty-four million, two hundred eighteen thousand, seven hundred twenty-eight".