40470538 has 4 divisors (see below), whose sum is σ = 60705810. Its totient is φ = 20235268.

The previous prime is 40470533. The next prime is 40470553. The reversal of 40470538 is 83507404.

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., 27846729 + 12623809 = 5277^2 + 3553^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (40470533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10117633 + ... + 10117636.

Almost surely, 2^40470538 is an apocalyptic number.

40470538 is a deficient number, since it is larger than the sum of its proper divisors (20235272).

40470538 is a wasteful number, since it uses less digits than its factorization.

40470538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20235271.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 40470538 is about 6361.6458562231. The cubic root of 40470538 is about 343.3309795505.

The spelling of 40470538 in words is "forty million, four hundred seventy thousand, five hundred thirty-eight".