400063946 has 8 divisors (see below), whose sum is σ = 603918660. Its totient is φ = 198757728.

The previous prime is 400063931. The next prime is 400063949. The reversal of 400063946 is 649360004.

It can be written as a sum of positive squares in 2 ways, for example, as 383572225 + 16491721 = 19585^2 + 4061^2 .

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

It is not an unprimeable number, because it can be changed into a prime (400063949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636731 + ... + 637358.

Almost surely, 2^400063946 is an apocalyptic number.

400063946 is a deficient number, since it is larger than the sum of its proper divisors (203854714).

400063946 is a wasteful number, since it uses less digits than its factorization.

400063946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274248.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 400063946 is about 20001.5985861131. The cubic root of 400063946 is about 736.8455608157.

The spelling of 400063946 in words is "four hundred million, sixty-three thousand, nine hundred forty-six".