40513538 has 8 divisors (see below), whose sum is σ = 65444988. Its totient is φ = 18698544.

The previous prime is 40513537. The next prime is 40513541. The reversal of 40513538 is 83531504.

It can be written as a sum of positive squares in 2 ways, for example, as 38477209 + 2036329 = 6203^2 + 1427^2 .

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

It is a super-2 number, since 2×40513538² = 3282693522554888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40513538.

It is not an unprimeable number, because it can be changed into a prime (40513537) 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, 779081 + ... + 779132.

Almost surely, 2^40513538 is an apocalyptic number.

40513538 is a deficient number, since it is larger than the sum of its proper divisors (24931450).

40513538 is a wasteful number, since it uses less digits than its factorization.

40513538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558228.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40513538 is about 6365.0245875409. The cubic root of 40513538 is about 343.4525330499.

The spelling of 40513538 in words is "forty million, five hundred thirteen thousand, five hundred thirty-eight".