240400623 has 32 divisors (see below), whose sum is σ = 342720000. Its totient is φ = 149567616.

The previous prime is 240400603. The next prime is 240400631. The reversal of 240400623 is 326004042.

It is a de Polignac number, because none of the positive numbers 2^k-240400623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240400623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240400603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 688653 + ... + 689001.

It is an arithmetic number, because the mean of its divisors is an integer number (10710000).

Almost surely, 2^240400623 is an apocalyptic number.

240400623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

240400623 is a deficient number, since it is larger than the sum of its proper divisors (102319377).

240400623 is a wasteful number, since it uses less digits than its factorization.

240400623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 240400623 is about 15504.8580451419. The cubic root of 240400623 is about 621.7920947467.

Adding to 240400623 its reverse (326004042), we get a palindrome (566404665).

The spelling of 240400623 in words is "two hundred forty million, four hundred thousand, six hundred twenty-three".