400045633 has 8 divisors (see below), whose sum is σ = 445674600. Its totient is φ = 356539008.

The previous prime is 400045619. The next prime is 400045673. The reversal of 400045633 is 336540004.

It can be written as a sum of positive squares in 4 ways, for example, as 100340289 + 299705344 = 10017^2 + 17312^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400045633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400045598 and 400045607.

It is not an unprimeable number, because it can be changed into a prime (400045603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530188 + ... + 530941.

It is an arithmetic number, because the mean of its divisors is an integer number (55709325).

Almost surely, 2^400045633 is an apocalyptic number.

It is an amenable number.

400045633 is a deficient number, since it is larger than the sum of its proper divisors (45628967).

400045633 is a wasteful number, since it uses less digits than its factorization.

400045633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061171.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 400045633 is about 20001.1407924648. The cubic root of 400045633 is about 736.8343175642.

Adding to 400045633 its reverse (336540004), we get a palindrome (736585637).

The spelling of 400045633 in words is "four hundred million, forty-five thousand, six hundred thirty-three".