400417345 has 4 divisors (see below), whose sum is σ = 480500820. Its totient is φ = 320333872.

The previous prime is 400417321. The next prime is 400417379. The reversal of 400417345 is 543714004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51437584 + 348979761 = 7172^2 + 18681^2 .

It is a cyclic number.

It is not a de Polignac number, because 400417345 - 2⁵ = 400417313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40041730 + ... + 40041739.

It is an arithmetic number, because the mean of its divisors is an integer number (120125205).

Almost surely, 2^400417345 is an apocalyptic number.

It is an amenable number.

400417345 is a deficient number, since it is larger than the sum of its proper divisors (80083475).

400417345 is an equidigital number, since it uses as much as digits as its factorization.

400417345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80083474.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 400417345 is about 20010.4309049056. The cubic root of 400417345 is about 737.0624626794.

The spelling of 400417345 in words is "four hundred million, four hundred seventeen thousand, three hundred forty-five".