1226897280 has 768 divisors, whose sum is σ = 5346432000. Its totient is φ = 268240896.

The previous prime is 1226897227. The next prime is 1226897281. The reversal of 1226897280 is 827986221.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226897281) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53343349 + ... + 53343371.

It is an arithmetic number, because the mean of its divisors is an integer number (6961500).

Almost surely, 2^1226897280 is an apocalyptic number.

1226897280 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 1226897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2673216000).

1226897280 is an abundant number, since it is smaller than the sum of its proper divisors (4119534720).

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

1226897280 is an frugal number, since it uses more digits than its factorization.

1226897280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1226897280 is about 35027.0935134504. The cubic root of 1226897280 is about 1070.5395944951.

The spelling of 1226897280 in words is "one billion, two hundred twenty-six million, eight hundred ninety-seven thousand, two hundred eighty".