408144986 has 4 divisors (see below), whose sum is σ = 612217482. Its totient is φ = 204072492.

The previous prime is 408144983. The next prime is 408145033. The reversal of 408144986 is 689441804.

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., 405015625 + 3129361 = 20125^2 + 1769^2 .

It is not an unprimeable number, because it can be changed into a prime (408144983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102036245 + ... + 102036248.

Almost surely, 2^408144986 is an apocalyptic number.

408144986 is a deficient number, since it is larger than the sum of its proper divisors (204072496).

408144986 is a wasteful number, since it uses less digits than its factorization.

408144986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204072495.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 408144986 is about 20202.5984962331. The cubic root of 408144986 is about 741.7737980890.

The spelling of 408144986 in words is "four hundred eight million, one hundred forty-four thousand, nine hundred eighty-six".