400340934 has 32 divisors (see below), whose sum is σ = 1016739840. Its totient is φ = 114383016.

The previous prime is 400340929. The next prime is 400340947. The reversal of 400340934 is 439043004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 400340898 and 400340907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529174 + ... + 529929.

It is an arithmetic number, because the mean of its divisors is an integer number (31773120).

Almost surely, 2^400340934 is an apocalyptic number.

400340934 is an abundant number, since it is smaller than the sum of its proper divisors (616398906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400340934 is a wasteful number, since it uses less digits than its factorization.

400340934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059121 (or 1059115 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 400340934 is about 20008.5215345862. The cubic root of 400340934 is about 737.0155755475.

Adding to 400340934 its reverse (439043004), we get a palindrome (839383938).

The spelling of 400340934 in words is "four hundred million, three hundred forty thousand, nine hundred thirty-four".