1224277990 has 16 divisors (see below), whose sum is σ = 2373216048. Its totient is φ = 452041056.

The previous prime is 1224277987. The next prime is 1224278051. The reversal of 1224277990 is 997724221.

It is a congruent number.

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, 4708632 + ... + 4708891.

It is an arithmetic number, because the mean of its divisors is an integer number (148326003).

Almost surely, 2^1224277990 is an apocalyptic number.

1224277990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1224277990 is a deficient number, since it is larger than the sum of its proper divisors (1148938058).

1224277990 is a wasteful number, since it uses less digits than its factorization.

1224277990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417543.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 1224277990 is about 34989.6840511600. The cubic root of 1224277990 is about 1069.7772238336. Note that the first 3 decimals are identical.

The spelling of 1224277990 in words is "one billion, two hundred twenty-four million, two hundred seventy-seven thousand, nine hundred ninety".