400007734 has 16 divisors (see below), whose sum is σ = 695122848. Its totient is φ = 169083072.

The previous prime is 400007723. The next prime is 400007737. The reversal of 400007734 is 437700004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400007699 and 400007708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400007737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194677 + ... + 196720.

It is an arithmetic number, because the mean of its divisors is an integer number (43445178).

Almost surely, 2^400007734 is an apocalyptic number.

400007734 is a deficient number, since it is larger than the sum of its proper divisors (295115114).

400007734 is a wasteful number, since it uses less digits than its factorization.

400007734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391479.

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 400007734 is about 20000.1933490654. The cubic root of 400007734 is about 736.8110484141.

Adding to 400007734 its reverse (437700004), we get a palindrome (837707738).

The spelling of 400007734 in words is "four hundred million, seven thousand, seven hundred thirty-four".