40400407 has 4 divisors (see below), whose sum is σ = 40416480. Its totient is φ = 40384336.

The previous prime is 40400389. The next prime is 40400413. The reversal of 40400407 is 70400404.

It is a happy number.

40400407 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40400407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400417) 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, 3358 + ... + 9595.

It is an arithmetic number, because the mean of its divisors is an integer number (10104120).

Almost surely, 2^40400407 is an apocalyptic number.

40400407 is a deficient number, since it is larger than the sum of its proper divisors (16073).

40400407 is a wasteful number, since it uses less digits than its factorization.

40400407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16072.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 40400407 is about 6356.1314492386. The cubic root of 40400407 is about 343.1325465851.

The spelling of 40400407 in words is "forty million, four hundred thousand, four hundred seven".