1228305764 has 24 divisors (see below), whose sum is σ = 2458810368. Its totient is φ = 525945600.

The previous prime is 1228305763. The next prime is 1228305781. The reversal of 1228305764 is 4675038221.

It is a happy number.

It is a super-3 number, since 3×1228305764³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1228305763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13172 + ... + 51284.

It is an arithmetic number, because the mean of its divisors is an integer number (102450432).

Almost surely, 2^1228305764 is an apocalyptic number.

1228305764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1228305764 is an abundant number, since it is smaller than the sum of its proper divisors (1230504604).

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

1228305764 is a wasteful number, since it uses less digits than its factorization.

1228305764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39275 (or 39273 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1228305764 is about 35047.1933826376. The cubic root of 1228305764 is about 1070.9490993712.

The spelling of 1228305764 in words is "one billion, two hundred twenty-eight million, three hundred five thousand, seven hundred sixty-four".