1226401986 has 16 divisors (see below), whose sum is σ = 2453147424. Its totient is φ = 408743424.

The previous prime is 1226401951. The next prime is 1226401991. The reversal of 1226401986 is 6891046221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74721 + ... + 89643.

It is an arithmetic number, because the mean of its divisors is an integer number (153321714).

Almost surely, 2^1226401986 is an apocalyptic number.

1226401986 is an abundant number, since it is smaller than the sum of its proper divisors (1226745438).

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

1226401986 is a wasteful number, since it uses less digits than its factorization.

1226401986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28625.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1226401986 is about 35020.0226441960. The cubic root of 1226401986 is about 1070.3955174498.

The spelling of 1226401986 in words is "one billion, two hundred twenty-six million, four hundred one thousand, nine hundred eighty-six".