623135442 has 32 divisors (see below), whose sum is σ = 1324209600. Its totient is φ = 195484224.

The previous prime is 623135423. The next prime is 623135473. The reversal of 623135442 is 244531326.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18909 + ... + 40047.

It is an arithmetic number, because the mean of its divisors is an integer number (41381550).

Almost surely, 2^623135442 is an apocalyptic number.

623135442 is an abundant number, since it is smaller than the sum of its proper divisors (701074158).

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

623135442 is a wasteful number, since it uses less digits than its factorization.

623135442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21195 (or 21161 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 623135442 is about 24962.6809858236. The cubic root of 623135442 is about 854.1368999544.

Adding to 623135442 its reverse (244531326), we get a palindrome (867666768).

The spelling of 623135442 in words is "six hundred twenty-three million, one hundred thirty-five thousand, four hundred forty-two".