1623138264 has 160 divisors (see below), whose sum is σ = 5042244240. Its totient is φ = 483667200.

The previous prime is 1623138263. The next prime is 1623138343. The reversal of 1623138264 is 4628313261.

1623138264 is a `hidden beast` number, since 1 + 623 + 1 + 3 + 8 + 26 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1623138263) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 432942 + ... + 436674.

Almost surely, 2^1623138264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623138264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521122120).

1623138264 is an abundant number, since it is smaller than the sum of its proper divisors (3419105976).

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

1623138264 is a wasteful number, since it uses less digits than its factorization.

1623138264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823 (or 3810 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1623138264 is about 40288.1901306078. The cubic root of 1623138264 is about 1175.2181913200.

The spelling of 1623138264 in words is "one billion, six hundred twenty-three million, one hundred thirty-eight thousand, two hundred sixty-four".