1523434638 has 16 divisors (see below), whose sum is σ = 3323857536. Its totient is φ = 461646840.

The previous prime is 1523434613. The next prime is 1523434667. The reversal of 1523434638 is 8364343251.

1523434638 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1523434596 and 1523434605.

It is a congruent number.

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, 11541106 + ... + 11541237.

It is an arithmetic number, because the mean of its divisors is an integer number (207741096).

Almost surely, 2^1523434638 is an apocalyptic number.

1523434638 is an abundant number, since it is smaller than the sum of its proper divisors (1800422898).

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

1523434638 is a wasteful number, since it uses less digits than its factorization.

1523434638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23082359.

The product of its digits is 207360, while the sum is 39.

The square root of 1523434638 is about 39031.2008270307. The cubic root of 1523434638 is about 1150.6447897621.

Adding to 1523434638 its reverse (8364343251), we get a palindrome (9887777889).

The spelling of 1523434638 in words is "one billion, five hundred twenty-three million, four hundred thirty-four thousand, six hundred thirty-eight".