1226204040 has 64 divisors (see below), whose sum is σ = 3687264000. Its totient is φ = 326218752.

The previous prime is 1226204029. The next prime is 1226204041. The reversal of 1226204040 is 404026221.

It is a junction number, because it is equal to n+sod(n) for n = 1226203998 and 1226204016.

It is not an unprimeable number, because it can be changed into a prime (1226204041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40161 + ... + 63759.

It is an arithmetic number, because the mean of its divisors is an integer number (57613500).

Almost surely, 2^1226204040 is an apocalyptic number.

1226204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1226204040 is an abundant number, since it is smaller than the sum of its proper divisors (2461059960).

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

1226204040 is a wasteful number, since it uses less digits than its factorization.

1226204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24046 (or 24042 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1226204040 is about 35017.1963469379. The cubic root of 1226204040 is about 1070.3379256993.

The spelling of 1226204040 in words is "one billion, two hundred twenty-six million, two hundred four thousand, forty".