497440138 has 8 divisors (see below), whose sum is σ = 803557188. Its totient is φ = 229587744.

The previous prime is 497440133. The next prime is 497440157. The reversal of 497440138 is 831044794.

It can be written as a sum of positive squares in 2 ways, for example, as 488277409 + 9162729 = 22097^2 + 3027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 497440138.

It is not an unprimeable number, because it can be changed into a prime (497440133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9566131 + ... + 9566182.

Almost surely, 2^497440138 is an apocalyptic number.

497440138 is a deficient number, since it is larger than the sum of its proper divisors (306117050).

497440138 is a wasteful number, since it uses less digits than its factorization.

497440138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19132328.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 497440138 is about 22303.3660688247. The cubic root of 497440138 is about 792.3436986051.

The spelling of 497440138 in words is "four hundred ninety-seven million, four hundred forty thousand, one hundred thirty-eight".