40408834 has 4 divisors (see below), whose sum is σ = 60613254. Its totient is φ = 20204416.

The previous prime is 40408831. The next prime is 40408853. The reversal of 40408834 is 43880404.

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., 33674809 + 6734025 = 5803^2 + 2595^2 .

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 40408796 and 40408805.

It is not an unprimeable number, because it can be changed into a prime (40408831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102207 + ... + 10102210.

Almost surely, 2^40408834 is an apocalyptic number.

40408834 is a deficient number, since it is larger than the sum of its proper divisors (20204420).

40408834 is a wasteful number, since it uses less digits than its factorization.

40408834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20204419.

The product of its (nonzero) digits is 12288, while the sum is 31.

The square root of 40408834 is about 6356.7943178933. The cubic root of 40408834 is about 343.1564025902.

The spelling of 40408834 in words is "forty million, four hundred eight thousand, eight hundred thirty-four".