1227649164 has 24 divisors (see below), whose sum is σ = 3273731328. Its totient is φ = 350756880.

The previous prime is 1227649151. The next prime is 1227649187. The reversal of 1227649164 is 4619467221.

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

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, 7307352 + ... + 7307519.

It is an arithmetic number, because the mean of its divisors is an integer number (136405472).

Almost surely, 2^1227649164 is an apocalyptic number.

1227649164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1227649164 is an abundant number, since it is smaller than the sum of its proper divisors (2046082164).

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

1227649164 is a wasteful number, since it uses less digits than its factorization.

1227649164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14614885 (or 14614883 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 1227649164 is about 35037.8247612491. The cubic root of 1227649164 is about 1070.7582374176.

The spelling of 1227649164 in words is "one billion, two hundred twenty-seven million, six hundred forty-nine thousand, one hundred sixty-four".