400606443 has 6 divisors (see below), whose sum is σ = 578653764. Its totient is φ = 267070956.

The previous prime is 400606439. The next prime is 400606463. The reversal of 400606443 is 344606004.

It is a happy number.

It is not a de Polignac number, because 400606443 - 2² = 400606439 is a prime.

It is a super-2 number, since 2×400606443² = 320971044346224498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400606403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22255905 + ... + 22255922.

It is an arithmetic number, because the mean of its divisors is an integer number (96442294).

Almost surely, 2^400606443 is an apocalyptic number.

400606443 is a deficient number, since it is larger than the sum of its proper divisors (178047321).

400606443 is a wasteful number, since it uses less digits than its factorization.

400606443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44511833 (or 44511830 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 400606443 is about 20015.1553328971. The cubic root of 400606443 is about 737.1784708933.

The spelling of 400606443 in words is "four hundred million, six hundred six thousand, four hundred forty-three".