40509963 has 80 divisors (see below), whose sum is σ = 72205056. Its totient is φ = 22394880.

The previous prime is 40509961. The next prime is 40509977. The reversal of 40509963 is 36990504.

It is not a de Polignac number, because 40509963 - 2¹ = 40509961 is a prime.

It is a super-2 number, since 2×40509963² = 3282114204522738, which contains 22 as substring.

40509963 is a modest number, since divided by 9963 gives 405 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40509961) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 554895 + ... + 554967.

Almost surely, 2^40509963 is an apocalyptic number.

40509963 is a deficient number, since it is larger than the sum of its proper divisors (31695093).

40509963 is a wasteful number, since it uses less digits than its factorization.

40509963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 40509963 is about 6364.7437497514. The cubic root of 40509963 is about 343.4424304276.

The spelling of 40509963 in words is "forty million, five hundred nine thousand, nine hundred sixty-three".