1226971928 has 64 divisors (see below), whose sum is σ = 2837022720. Its totient is φ = 484444800.

The previous prime is 1226971913. The next prime is 1226971931. The reversal of 1226971928 is 8291796221.

It is a super-2 number, since 2×1226971928² = 3010920224200074368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458033 + ... + 460703.

It is an arithmetic number, because the mean of its divisors is an integer number (44328480).

Almost surely, 2^1226971928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226971928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418511360).

1226971928 is an abundant number, since it is smaller than the sum of its proper divisors (1610050792).

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

1226971928 is a wasteful number, since it uses less digits than its factorization.

1226971928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3324 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 1226971928 is about 35028.1590723806. The cubic root of 1226971928 is about 1070.5613056359.

The spelling of 1226971928 in words is "one billion, two hundred twenty-six million, nine hundred seventy-one thousand, nine hundred twenty-eight".