400599545 has 8 divisors (see below), whose sum is σ = 487305096. Its totient is φ = 316089216.

The previous prime is 400599541. The next prime is 400599559. The reversal of 400599545 is 545995004.

It can be written as a sum of positive squares in 4 ways, for example, as 5067001 + 395532544 = 2251^2 + 19888^2 .

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 400599545 - 2² = 400599541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400599541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548402 + ... + 549131.

It is an arithmetic number, because the mean of its divisors is an integer number (60913137).

Almost surely, 2^400599545 is an apocalyptic number.

It is an amenable number.

400599545 is a deficient number, since it is larger than the sum of its proper divisors (86705551).

400599545 is a wasteful number, since it uses less digits than its factorization.

400599545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097611.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 400599545 is about 20014.9830127332. The cubic root of 400599545 is about 737.1742397362.

The spelling of 400599545 in words is "four hundred million, five hundred ninety-nine thousand, five hundred forty-five".