1266152928 has 144 divisors (see below), whose sum is σ = 3609494784. Its totient is φ = 388372480.

The previous prime is 1266152917. The next prime is 1266152947. The reversal of 1266152928 is 8292516621.

It is a self number, because there is not a number n which added to its sum of digits gives 1266152928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1303483 + ... + 1304453.

It is an arithmetic number, because the mean of its divisors is an integer number (25065936).

Almost surely, 2^1266152928 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 1266152928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804747392).

1266152928 is an abundant number, since it is smaller than the sum of its proper divisors (2343341856).

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

1266152928 is a wasteful number, since it uses less digits than its factorization.

1266152928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1040 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 1266152928 is about 35583.0427029505. The cubic root of 1266152928 is about 1081.8375575998.

The spelling of 1266152928 in words is "one billion, two hundred sixty-six million, one hundred fifty-two thousand, nine hundred twenty-eight".