623207128 has 8 divisors (see below), whose sum is σ = 1168513380. Its totient is φ = 311603560.

The previous prime is 623207113. The next prime is 623207141. The reversal of 623207128 is 821702326.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 623207128.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 38950438 + ... + 38950453.

Almost surely, 2^623207128 is an apocalyptic number.

It is an amenable number.

623207128 is a deficient number, since it is larger than the sum of its proper divisors (545306252).

623207128 is a wasteful number, since it uses less digits than its factorization.

623207128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77900897 (or 77900893 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 623207128 is about 24964.1168079305. The cubic root of 623207128 is about 854.1696522294.

The spelling of 623207128 in words is "six hundred twenty-three million, two hundred seven thousand, one hundred twenty-eight".