1623725634 has 16 divisors (see below), whose sum is σ = 3250553760. Its totient is φ = 540724800.

The previous prime is 1623725629. The next prime is 1623725651. The reversal of 1623725634 is 4365273261.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1623725592 and 1623725601.

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, 122439 + ... + 135050.

It is an arithmetic number, because the mean of its divisors is an integer number (203159610).

Almost surely, 2^1623725634 is an apocalyptic number.

1623725634 is an abundant number, since it is smaller than the sum of its proper divisors (1626828126).

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

1623725634 is a wasteful number, since it uses less digits than its factorization.

1623725634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258545.

The product of its digits is 181440, while the sum is 39.

The square root of 1623725634 is about 40295.4790764423. The cubic root of 1623725634 is about 1175.3599341555.

Adding to 1623725634 its reverse (4365273261), we get a palindrome (5988998895).

The spelling of 1623725634 in words is "one billion, six hundred twenty-three million, seven hundred twenty-five thousand, six hundred thirty-four".