1623856872 has 64 divisors (see below), whose sum is σ = 4442319360. Its totient is φ = 490564800.

The previous prime is 1623856867. The next prime is 1623856901. The reversal of 1623856872 is 2786583261.

It is a super-2 number, since 2×1623856872² = 5273822281483248768, which contains 22 as substring.

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, 78093 + ... + 96675.

It is an arithmetic number, because the mean of its divisors is an integer number (69411240).

Almost surely, 2^1623856872 is an apocalyptic number.

1623856872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623856872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221159680).

1623856872 is an abundant number, since it is smaller than the sum of its proper divisors (2818462488).

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

1623856872 is a wasteful number, since it uses less digits than its factorization.

1623856872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18934 (or 18930 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 1623856872 is about 40297.1074892479. The cubic root of 1623856872 is about 1175.3915995486.

The spelling of 1623856872 in words is "one billion, six hundred twenty-three million, eight hundred fifty-six thousand, eight hundred seventy-two".