451671138 has 12 divisors (see below), whose sum is σ = 978620838. Its totient is φ = 150557040.

The previous prime is 451671131. The next prime is 451671139. The reversal of 451671138 is 831176154.

451671138 is a `hidden beast` number, since 4 + 516 + 7 + 1 + 138 = 666.

It can be written as a sum of positive squares in only one way, i.e., 451010169 + 660969 = 21237^2 + 813^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (451671131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12546403 + ... + 12546438.

Almost surely, 2^451671138 is an apocalyptic number.

451671138 is an abundant number, since it is smaller than the sum of its proper divisors (526949700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451671138 is a wasteful number, since it uses less digits than its factorization.

451671138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25092849 (or 25092846 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 451671138 is about 21252.5560345103. The cubic root of 451671138 is about 767.2568596785.

The spelling of 451671138 in words is "four hundred fifty-one million, six hundred seventy-one thousand, one hundred thirty-eight".