400316642 has 12 divisors (see below), whose sum is σ = 660026598. Its totient is φ = 181962000.

The previous prime is 400316617. The next prime is 400316659. The reversal of 400316642 is 246613004.

It can be written as a sum of positive squares in only one way, i.e., 317160481 + 83156161 = 17809^2 + 9119^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 826859 + ... + 827342.

Almost surely, 2^400316642 is an apocalyptic number.

400316642 is a deficient number, since it is larger than the sum of its proper divisors (259709956).

400316642 is a wasteful number, since it uses less digits than its factorization.

400316642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654225 (or 1654214 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 400316642 is about 20007.9144840236. The cubic root of 400316642 is about 737.0006682997. Note that the first 3 decimals are identical.

Adding to 400316642 its reverse (246613004), we get a palindrome (646929646).

The spelling of 400316642 in words is "four hundred million, three hundred sixteen thousand, six hundred forty-two".