1623431136 has 192 divisors, whose sum is σ = 4746470400. Its totient is φ = 483710976.

The previous prime is 1623431123. The next prime is 1623431143. The reversal of 1623431136 is 6311343261.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2485786 + ... + 2486438.

It is an arithmetic number, because the mean of its divisors is an integer number (24721200).

Almost surely, 2^1623431136 is an apocalyptic number.

1623431136 is a gapful number since it is divisible by the number (16) 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 1623431136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2373235200).

1623431136 is an abundant number, since it is smaller than the sum of its proper divisors (3123039264).

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

1623431136 is a wasteful number, since it uses less digits than its factorization.

1623431136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 753 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

The square root of 1623431136 is about 40291.8246794558. The cubic root of 1623431136 is about 1175.2888708200.

Adding to 1623431136 its reverse (6311343261), we get a palindrome (7934774397).

The spelling of 1623431136 in words is "one billion, six hundred twenty-three million, four hundred thirty-one thousand, one hundred thirty-six".