400654645 has 8 divisors (see below), whose sum is σ = 481003704. Its totient is φ = 320378304.

The previous prime is 400654637. The next prime is 400654673. The reversal of 400654645 is 546456004.

It can be written as a sum of positive squares in 4 ways, for example, as 16573041 + 384081604 = 4071^2 + 19598^2 .

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 400654645 - 2³ = 400654637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400654645.

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, 5214 + ... + 28783.

It is an arithmetic number, because the mean of its divisors is an integer number (60125463).

Almost surely, 2^400654645 is an apocalyptic number.

It is an amenable number.

400654645 is a deficient number, since it is larger than the sum of its proper divisors (80349059).

400654645 is a wasteful number, since it uses less digits than its factorization.

400654645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36359.

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 400654645 is about 20016.3594342228. The cubic root of 400654645 is about 737.2080361122.

The spelling of 400654645 in words is "four hundred million, six hundred fifty-four thousand, six hundred forty-five".