400440046 has 4 divisors (see below), whose sum is σ = 600660072. Its totient is φ = 200220022.

The previous prime is 400440043. The next prime is 400440077. The reversal of 400440046 is 640044004.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 400439999 and 400440026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400440041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110010 + ... + 100110013.

It is an arithmetic number, because the mean of its divisors is an integer number (150165018).

Almost surely, 2^400440046 is an apocalyptic number.

400440046 is a deficient number, since it is larger than the sum of its proper divisors (200220026).

400440046 is a wasteful number, since it uses less digits than its factorization.

400440046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200220025.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 400440046 is about 20010.9981260306. The cubic root of 400440046 is about 737.0763912625.

The spelling of 400440046 in words is "four hundred million, four hundred forty thousand, forty-six".