1225990768 has 20 divisors (see below), whose sum is σ = 2515084560. Its totient is φ = 576936704.

The previous prime is 1225990763. The next prime is 1225990771. The reversal of 1225990768 is 8670995221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225990763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2253388 + ... + 2253931.

It is an arithmetic number, because the mean of its divisors is an integer number (125754228).

Almost surely, 2^1225990768 is an apocalyptic number.

It is an amenable number.

1225990768 is an abundant number, since it is smaller than the sum of its proper divisors (1289093792).

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

1225990768 is a wasteful number, since it uses less digits than its factorization.

1225990768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507344 (or 4507338 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1225990768 is about 35014.1509678587. The cubic root of 1225990768 is about 1070.2758679617.

The spelling of 1225990768 in words is "one billion, two hundred twenty-five million, nine hundred ninety thousand, seven hundred sixty-eight".