623215242 has 64 divisors (see below), whose sum is σ = 1497202560. Its totient is φ = 191020032.

The previous prime is 623215217. The next prime is 623215247. The reversal of 623215242 is 242512326.

It is a happy number.

623215242 is a `hidden beast` number, since 623 + 2 + 15 + 24 + 2 = 666.

It is a super-2 number, since 2×623215242² = 776794475722237128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (623215247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197098 + ... + 200234.

It is an arithmetic number, because the mean of its divisors is an integer number (23393790).

Almost surely, 2^623215242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623215242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (748601280).

623215242 is an abundant number, since it is smaller than the sum of its proper divisors (873987318).

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

623215242 is a wasteful number, since it uses less digits than its factorization.

623215242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444 (or 3438 counting only the distinct ones).

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

The square root of 623215242 is about 24964.2793206614. The cubic root of 623215242 is about 854.1733592379.

Adding to 623215242 its reverse (242512326), we get a palindrome (865727568).

The spelling of 623215242 in words is "six hundred twenty-three million, two hundred fifteen thousand, two hundred forty-two".