40395538 has 4 divisors (see below), whose sum is σ = 60593310. Its totient is φ = 20197768.

The previous prime is 40395529. The next prime is 40395559. The reversal of 40395538 is 83559304.

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., 38526849 + 1868689 = 6207^2 + 1367^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40395497 and 40395506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098883 + ... + 10098886.

Almost surely, 2^40395538 is an apocalyptic number.

40395538 is a deficient number, since it is larger than the sum of its proper divisors (20197772).

40395538 is a wasteful number, since it uses less digits than its factorization.

40395538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20197771.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 40395538 is about 6355.7484217046. The cubic root of 40395538 is about 343.1187614147.

The spelling of 40395538 in words is "forty million, three hundred ninety-five thousand, five hundred thirty-eight".