1226562880 has 28 divisors (see below), whose sum is σ = 2920753620. Its totient is φ = 490625024.

The previous prime is 1226562853. The next prime is 1226562881. The reversal of 1226562880 is 882656221.

It can be written as a sum of positive squares in 2 ways, for example, as 716525824 + 510037056 = 26768^2 + 22584^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226562881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916185 + ... + 1916824.

Almost surely, 2^1226562880 is an apocalyptic number.

1226562880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226562880 is an abundant number, since it is smaller than the sum of its proper divisors (1694190740).

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

1226562880 is an equidigital number, since it uses as much as digits as its factorization.

1226562880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833026 (or 3833016 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1226562880 is about 35022.3197404170. The cubic root of 1226562880 is about 1070.4423244749.

The spelling of 1226562880 in words is "one billion, two hundred twenty-six million, five hundred sixty-two thousand, eight hundred eighty".