40019641 has 4 divisors (see below), whose sum is σ = 40698000. Its totient is φ = 39341284.

The previous prime is 40019633. The next prime is 40019659. The reversal of 40019641 is 14691004.

40019641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40019641 - 2³ = 40019633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40019621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339091 + ... + 339208.

It is an arithmetic number, because the mean of its divisors is an integer number (10174500).

Almost surely, 2^40019641 is an apocalyptic number.

It is an amenable number.

40019641 is a deficient number, since it is larger than the sum of its proper divisors (678359).

40019641 is an equidigital number, since it uses as much as digits as its factorization.

40019641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678358.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 40019641 is about 6326.1078871610. The cubic root of 40019641 is about 342.0511562386.

The spelling of 40019641 in words is "forty million, nineteen thousand, six hundred forty-one".