400624445 has 8 divisors (see below), whose sum is σ = 517730136. Its totient is φ = 295845696.

The previous prime is 400624417. The next prime is 400624457. The reversal of 400624445 is 544426004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4853209 + 395771236 = 2203^2 + 19894^2 .

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-400624445 is a prime.

It is a Duffinian number.

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, 3081662 + ... + 3081791.

It is an arithmetic number, because the mean of its divisors is an integer number (64716267).

Almost surely, 2^400624445 is an apocalyptic number.

It is an amenable number.

400624445 is a deficient number, since it is larger than the sum of its proper divisors (117105691).

400624445 is a wasteful number, since it uses less digits than its factorization.

400624445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163471.

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 400624445 is about 20015.6050370705. The cubic root of 400624445 is about 737.1895128924.

The spelling of 400624445 in words is "four hundred million, six hundred twenty-four thousand, four hundred forty-five".