1064136820 has 48 divisors (see below), whose sum is σ = 2261468160. Its totient is φ = 420578816.

The previous prime is 1064136797. The next prime is 1064136847. The reversal of 1064136820 is 286314601.

It is a happy number.

It is a super-2 number, since 2×1064136820² = 2264774343359424800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1082049 + ... + 1083031.

It is an arithmetic number, because the mean of its divisors is an integer number (47113920).

Almost surely, 2^1064136820 is an apocalyptic number.

1064136820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1064136820 is an abundant number, since it is smaller than the sum of its proper divisors (1197331340).

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

1064136820 is a wasteful number, since it uses less digits than its factorization.

1064136820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1064136820 is about 32621.1100362940. The cubic root of 1064136820 is about 1020.9375015104.

The spelling of 1064136820 in words is "one billion, sixty-four million, one hundred thirty-six thousand, eight hundred twenty".