40408863 has 16 divisors (see below), whose sum is σ = 60145536. Its totient is φ = 23919840.

The previous prime is 40408853. The next prime is 40408867. The reversal of 40408863 is 36880404.

It is not a de Polignac number, because 40408863 - 2⁵ = 40408831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12820 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (3759096).

Almost surely, 2^40408863 is an apocalyptic number.

40408863 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40408863 is a deficient number, since it is larger than the sum of its proper divisors (19736673).

40408863 is a wasteful number, since it uses less digits than its factorization.

40408863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28534.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 40408863 is about 6356.7965989168. The cubic root of 40408863 is about 343.1564846806.

The spelling of 40408863 in words is "forty million, four hundred eight thousand, eight hundred sixty-three".