1122400278 has 24 divisors (see below), whose sum is σ = 2433604368. Its totient is φ = 373866192.

The previous prime is 1122400277. The next prime is 1122400303. The reversal of 1122400278 is 8720042211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122400273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4500 + ... + 47592.

It is an arithmetic number, because the mean of its divisors is an integer number (101400182).

Almost surely, 2^1122400278 is an apocalyptic number.

1122400278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1122400278 is an abundant number, since it is smaller than the sum of its proper divisors (1311204090).

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

1122400278 is a wasteful number, since it uses less digits than its factorization.

1122400278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44548 (or 44545 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 1122400278 is about 33502.2428801416. The cubic root of 1122400278 is about 1039.2401618263.

Adding to 1122400278 its reverse (8720042211), we get a palindrome (9842442489).

The spelling of 1122400278 in words is "one billion, one hundred twenty-two million, four hundred thousand, two hundred seventy-eight".