1223495280 has 440 divisors, whose sum is σ = 5008271712. Its totient is φ = 272097792.

The previous prime is 1223495263. The next prime is 1223495323. The reversal of 1223495280 is 825943221.

It is a happy number.

1223495280 is a `hidden beast` number, since 122 + 3 + 4 + 9 + 528 + 0 = 666.

It is a super-3 number, since 3×1223495280³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 33067422 + ... + 33067458.

Almost surely, 2^1223495280 is an apocalyptic number.

1223495280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223495280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2504135856).

1223495280 is an abundant number, since it is smaller than the sum of its proper divisors (3784776432).

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

1223495280 is an frugal number, since it uses more digits than its factorization.

1223495280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1223495280 is about 34978.4973948282. The cubic root of 1223495280 is about 1069.5491972357.

The spelling of 1223495280 in words is "one billion, two hundred twenty-three million, four hundred ninety-five thousand, two hundred eighty".