1225673280 has 336 divisors, whose sum is σ = 4781824320. Its totient is φ = 285659136.

The previous prime is 1225673269. The next prime is 1225673303. The reversal of 1225673280 is 823765221.

1225673280 is a `hidden beast` number, since 12 + 2 + 567 + 3 + 2 + 80 = 666.

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 47 ways as a sum of consecutive naturals, for example, 710499 + ... + 712221.

It is an arithmetic number, because the mean of its divisors is an integer number (14231620).

Almost surely, 2^1225673280 is an apocalyptic number.

1225673280 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 1225673280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2390912160).

1225673280 is an abundant number, since it is smaller than the sum of its proper divisors (3556151040).

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

1225673280 is a wasteful number, since it uses less digits than its factorization.

1225673280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1225673280 is about 35009.6169644856. The cubic root of 1225673280 is about 1070.1834721922.

The spelling of 1225673280 in words is "one billion, two hundred twenty-five million, six hundred seventy-three thousand, two hundred eighty".