623701040 has 20 divisors (see below), whose sum is σ = 1450105104. Its totient is φ = 249480384.

The previous prime is 623701033. The next prime is 623701069. The reversal of 623701040 is 40107326.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 623700997 and 623701015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3898052 + ... + 3898211.

Almost surely, 2^623701040 is an apocalyptic number.

It is an amenable number.

623701040 is an abundant number, since it is smaller than the sum of its proper divisors (826404064).

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

623701040 is a wasteful number, since it uses less digits than its factorization.

623701040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7796276 (or 7796270 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 623701040 is about 24974.0072875780. The cubic root of 623701040 is about 854.3952450908.

Adding to 623701040 its reverse (40107326), we get a palindrome (663808366).

The spelling of 623701040 in words is "six hundred twenty-three million, seven hundred one thousand, forty".