1026651264 has 128 divisors (see below), whose sum is σ = 2791601280. Its totient is φ = 334233600.

The previous prime is 1026651259. The next prime is 1026651277. The reversal of 1026651264 is 4621566201.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3994624 + ... + 3994880.

It is an arithmetic number, because the mean of its divisors is an integer number (21809385).

Almost surely, 2^1026651264 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 1026651264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395800640).

1026651264 is an abundant number, since it is smaller than the sum of its proper divisors (1764950016).

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

1026651264 is a wasteful number, since it uses less digits than its factorization.

1026651264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1026651264 is about 32041.3992203836. The cubic root of 1026651264 is about 1008.8059817315.

The spelling of 1026651264 in words is "one billion, twenty-six million, six hundred fifty-one thousand, two hundred sixty-four".