400456445 has 16 divisors (see below), whose sum is σ = 507967680. Its totient is φ = 302227200.

The previous prime is 400456411. The next prime is 400456457. The reversal of 400456445 is 544654004.

It is not a de Polignac number, because 400456445 - 2¹⁰ = 400455421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14150 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (31747980).

Almost surely, 2^400456445 is an apocalyptic number.

It is an amenable number.

400456445 is a deficient number, since it is larger than the sum of its proper divisors (107511235).

400456445 is a wasteful number, since it uses less digits than its factorization.

400456445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17756.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 400456445 is about 20011.4078715117. The cubic root of 400456445 is about 737.0864528193.

The spelling of 400456445 in words is "four hundred million, four hundred fifty-six thousand, four hundred forty-five".