1064256920 has 32 divisors (see below), whose sum is σ = 2498692320. Its totient is φ = 407193600.

The previous prime is 1064256917. The next prime is 1064256929. The reversal of 1064256920 is 296524601.

It is a happy number.

It is a super-2 number, since 2×1064256920² = 2265285583535772800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1064256929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577481 + ... + 579320.

It is an arithmetic number, because the mean of its divisors is an integer number (78084135).

Almost surely, 2^1064256920 is an apocalyptic number.

1064256920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1064256920 is an abundant number, since it is smaller than the sum of its proper divisors (1434435400).

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

1064256920 is a wasteful number, since it uses less digits than its factorization.

1064256920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156835 (or 1156831 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1064256920 is about 32622.9508168712. The cubic root of 1064256920 is about 1020.9759082200.

The spelling of 1064256920 in words is "one billion, sixty-four million, two hundred fifty-six thousand, nine hundred twenty".