40403379 has 4 divisors (see below), whose sum is σ = 53871176. Its totient is φ = 26935584.

The previous prime is 40403369. The next prime is 40403393. The reversal of 40403379 is 97330404.

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

It is not a de Polignac number, because 40403379 - 2⁸ = 40403123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40403309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6733894 + ... + 6733899.

It is an arithmetic number, because the mean of its divisors is an integer number (13467794).

Almost surely, 2^40403379 is an apocalyptic number.

40403379 is a deficient number, since it is larger than the sum of its proper divisors (13467797).

40403379 is a wasteful number, since it uses less digits than its factorization.

40403379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13467796.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 40403379 is about 6356.3652349436. The cubic root of 40403379 is about 343.1409604024.

Subtracting 40403379 from its reverse (97330404), we obtain a square (56927025 = 7545²).

The spelling of 40403379 in words is "forty million, four hundred three thousand, three hundred seventy-nine".