1244778278 has 32 divisors (see below), whose sum is σ = 1954947072. Its totient is φ = 593762400.

The previous prime is 1244778263. The next prime is 1244778289. The reversal of 1244778278 is 8728774421.

It is a super-2 number, since 2×1244778278² = 3098945922761290568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2688275 + ... + 2688737.

It is an arithmetic number, because the mean of its divisors is an integer number (61092096).

Almost surely, 2^1244778278 is an apocalyptic number.

1244778278 is a deficient number, since it is larger than the sum of its proper divisors (710168794).

1244778278 is a wasteful number, since it uses less digits than its factorization.

1244778278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its digits is 1404928, while the sum is 50.

The square root of 1244778278 is about 35281.4154761398. The cubic root of 1244778278 is about 1075.7152702900.

The spelling of 1244778278 in words is "one billion, two hundred forty-four million, seven hundred seventy-eight thousand, two hundred seventy-eight".