1227664158 has 64 divisors (see below), whose sum is σ = 2873456640. Its totient is φ = 342381312.

The previous prime is 1227664093. The next prime is 1227664183. The reversal of 1227664158 is 8514667221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1122660 + ... + 1123752.

It is an arithmetic number, because the mean of its divisors is an integer number (44897760).

Almost surely, 2^1227664158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227664158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436728320).

1227664158 is an abundant number, since it is smaller than the sum of its proper divisors (1645792482).

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

1227664158 is a wasteful number, since it uses less digits than its factorization.

1227664158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its digits is 161280, while the sum is 42.

The square root of 1227664158 is about 35038.0387293581. The cubic root of 1227664158 is about 1070.7625966661.

The spelling of 1227664158 in words is "one billion, two hundred twenty-seven million, six hundred sixty-four thousand, one hundred fifty-eight".