1226965440 has 112 divisors (see below), whose sum is σ = 3986345088. Its totient is φ = 319570944.

The previous prime is 1226965417. The next prime is 1226965457. The reversal of 1226965440 is 445696221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26419 + ... + 56141.

Almost surely, 2^1226965440 is an apocalyptic number.

1226965440 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 1226965440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1993172544).

1226965440 is an abundant number, since it is smaller than the sum of its proper divisors (2759379648).

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

1226965440 is a wasteful number, since it uses less digits than its factorization.

1226965440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29786 (or 29776 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1226965440 is about 35028.0664610538. The cubic root of 1226965440 is about 1070.5594186560.

The spelling of 1226965440 in words is "one billion, two hundred twenty-six million, nine hundred sixty-five thousand, four hundred forty".