408677138 has 4 divisors (see below), whose sum is σ = 613015710. Its totient is φ = 204338568.

The previous prime is 408677081. The next prime is 408677147. The reversal of 408677138 is 831776804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 349802209 + 58874929 = 18703^2 + 7673^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102169283 + ... + 102169286.

Almost surely, 2^408677138 is an apocalyptic number.

408677138 is a deficient number, since it is larger than the sum of its proper divisors (204338572).

408677138 is a wasteful number, since it uses less digits than its factorization.

408677138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204338571.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 408677138 is about 20215.7645910314. The cubic root of 408677138 is about 742.0960405856.

The spelling of 408677138 in words is "four hundred eight million, six hundred seventy-seven thousand, one hundred thirty-eight".