400440434 has 8 divisors (see below), whose sum is σ = 610841520. Its totient is φ = 196826596.

The previous prime is 400440427. The next prime is 400440461. The reversal of 400440434 is 434044004.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696664 + ... + 1696899.

It is an arithmetic number, because the mean of its divisors is an integer number (76355190).

Almost surely, 2^400440434 is an apocalyptic number.

400440434 is a deficient number, since it is larger than the sum of its proper divisors (210401086).

400440434 is a wasteful number, since it uses less digits than its factorization.

400440434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393624.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 400440434 is about 20011.0078206971. The cubic root of 400440434 is about 737.0766293219.

Adding to 400440434 its reverse (434044004), we get a palindrome (834484438).

The spelling of 400440434 in words is "four hundred million, four hundred forty thousand, four hundred thirty-four".