623140542 has 48 divisors (see below), whose sum is σ = 1434843072. Its totient is φ = 194772480.

The previous prime is 623140537. The next prime is 623140543. The reversal of 623140542 is 245041326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623140543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82363 + ... + 89609.

It is an arithmetic number, because the mean of its divisors is an integer number (29892564).

Almost surely, 2^623140542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623140542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717421536).

623140542 is an abundant number, since it is smaller than the sum of its proper divisors (811702530).

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

623140542 is a wasteful number, since it uses less digits than its factorization.

623140542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553 (or 7550 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 623140542 is about 24962.7831381038. The cubic root of 623140542 is about 854.1392301521.

Adding to 623140542 its reverse (245041326), we get a palindrome (868181868).

The spelling of 623140542 in words is "six hundred twenty-three million, one hundred forty thousand, five hundred forty-two".