629618138 has 16 divisors (see below), whose sum is σ = 959423616. Its totient is φ = 309828960.

The previous prime is 629618113. The next prime is 629618147. The reversal of 629618138 is 831816926.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67295 + ... + 76077.

It is an arithmetic number, because the mean of its divisors is an integer number (59963976).

Almost surely, 2^629618138 is an apocalyptic number.

629618138 is a deficient number, since it is larger than the sum of its proper divisors (329805478).

629618138 is a wasteful number, since it uses less digits than its factorization.

629618138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349.

The product of its digits is 124416, while the sum is 44.

The square root of 629618138 is about 25092.1927698637. The cubic root of 629618138 is about 857.0886491300.

The spelling of 629618138 in words is "six hundred twenty-nine million, six hundred eighteen thousand, one hundred thirty-eight".