40640403 has 8 divisors (see below), whose sum is σ = 54577600. Its totient is φ = 26898408.

The previous prime is 40640399. The next prime is 40640417. The reversal of 40640403 is 30404604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40640403 - 2² = 40640399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40640403.

It is not an unprimeable number, because it can be changed into a prime (40640443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48313 + ... + 49146.

It is an arithmetic number, because the mean of its divisors is an integer number (6822200).

Almost surely, 2^40640403 is an apocalyptic number.

40640403 is a deficient number, since it is larger than the sum of its proper divisors (13937197).

40640403 is a wasteful number, since it uses less digits than its factorization.

40640403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97601.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 40640403 is about 6374.9825882115. The cubic root of 40640403 is about 343.8106578137.

The spelling of 40640403 in words is "forty million, six hundred forty thousand, four hundred three".