1623898820 has 24 divisors (see below), whose sum is σ = 3610787544. Its totient is φ = 611350016.

The previous prime is 1623898811. The next prime is 1623898879. The reversal of 1623898820 is 288983261.

It can be written as a sum of positive squares in 4 ways, for example, as 50665924 + 1573232896 = 7118^2 + 39664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2387747 + ... + 2388426.

It is an arithmetic number, because the mean of its divisors is an integer number (150449481).

Almost surely, 2^1623898820 is an apocalyptic number.

1623898820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623898820 is an abundant number, since it is smaller than the sum of its proper divisors (1986888724).

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

1623898820 is a wasteful number, since it uses less digits than its factorization.

1623898820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776199 (or 4776197 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 1623898820 is about 40297.6279698942. The cubic root of 1623898820 is about 1175.4017204944.

The spelling of 1623898820 in words is "one billion, six hundred twenty-three million, eight hundred ninety-eight thousand, eight hundred twenty".