400534646 has 4 divisors (see below), whose sum is σ = 600801972. Its totient is φ = 200267322.

The previous prime is 400534639. The next prime is 400534669. The reversal of 400534646 is 646435004.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100133660 + ... + 100133663.

It is an arithmetic number, because the mean of its divisors is an integer number (150200493).

Almost surely, 2^400534646 is an apocalyptic number.

400534646 is a deficient number, since it is larger than the sum of its proper divisors (200267326).

400534646 is a wasteful number, since it uses less digits than its factorization.

400534646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200267325.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 400534646 is about 20013.3616866333. The cubic root of 400534646 is about 737.1344290281.

The spelling of 400534646 in words is "four hundred million, five hundred thirty-four thousand, six hundred forty-six".