623840261 has 8 divisors (see below), whose sum is σ = 689876544. Its totient is φ = 559357920.

The previous prime is 623840251. The next prime is 623840267. The reversal of 623840261 is 162048326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623840261 - 2¹⁸ = 623578117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623840267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387641 + ... + 389246.

It is an arithmetic number, because the mean of its divisors is an integer number (86234568).

Almost surely, 2^623840261 is an apocalyptic number.

It is an amenable number.

623840261 is a deficient number, since it is larger than the sum of its proper divisors (66036283).

623840261 is a wasteful number, since it uses less digits than its factorization.

623840261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776971.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 623840261 is about 24976.7944500490. The cubic root of 623840261 is about 854.4588123575.

Adding to 623840261 its reverse (162048326), we get a palindrome (785888587).

The spelling of 623840261 in words is "six hundred twenty-three million, eight hundred forty thousand, two hundred sixty-one".