40400445 has 8 divisors (see below), whose sum is σ = 64640736. Its totient is φ = 21546896.

The previous prime is 40400431. The next prime is 40400453. The reversal of 40400445 is 54400404.

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

It is a cyclic number.

It is not a de Polignac number, because 40400445 - 2⁵ = 40400413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346667 + ... + 1346696.

It is an arithmetic number, because the mean of its divisors is an integer number (8080092).

Almost surely, 2^40400445 is an apocalyptic number.

It is an amenable number.

40400445 is a deficient number, since it is larger than the sum of its proper divisors (24240291).

40400445 is a wasteful number, since it uses less digits than its factorization.

40400445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693371.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40400445 is about 6356.1344384775. The cubic root of 40400445 is about 343.1326541668.

Adding to 40400445 its reverse (54400404), we get a palindrome (94800849).

The spelling of 40400445 in words is "forty million, four hundred thousand, four hundred forty-five".