40358939 has 4 divisors (see below), whose sum is σ = 40382424. Its totient is φ = 40335456.

The previous prime is 40358863. The next prime is 40358957. The reversal of 40358939 is 93985304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40358939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40358896 and 40358905.

It is not an unprimeable number, because it can be changed into a prime (40358959) 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, 8942 + ... + 12675.

It is an arithmetic number, because the mean of its divisors is an integer number (10095606).

Almost surely, 2^40358939 is an apocalyptic number.

40358939 is a deficient number, since it is larger than the sum of its proper divisors (23485).

40358939 is a wasteful number, since it uses less digits than its factorization.

40358939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23484.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 40358939 is about 6352.8685646722. The cubic root of 40358939 is about 343.0151064187.

The spelling of 40358939 in words is "forty million, three hundred fifty-eight thousand, nine hundred thirty-nine".