623788634 has 16 divisors (see below), whose sum is σ = 1103847936. Its totient is φ = 258714000.

The previous prime is 623788631. The next prime is 623788657. The reversal of 623788634 is 436887326.

It is a super-2 number, since 2×623788634² = 778224519815171912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (623788631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 718217 + ... + 719084.

It is an arithmetic number, because the mean of its divisors is an integer number (68990496).

Almost surely, 2^623788634 is an apocalyptic number.

623788634 is a deficient number, since it is larger than the sum of its proper divisors (480059302).

623788634 is a wasteful number, since it uses less digits than its factorization.

623788634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437341.

The product of its digits is 1161216, while the sum is 47.

The square root of 623788634 is about 24975.7609293491. The cubic root of 623788634 is about 854.4352409590.

The spelling of 623788634 in words is "six hundred twenty-three million, seven hundred eighty-eight thousand, six hundred thirty-four".