400740754 has 4 divisors (see below), whose sum is σ = 601111134. Its totient is φ = 200370376.

The previous prime is 400740733. The next prime is 400740757. The reversal of 400740754 is 457047004.

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

It can be written as a sum of positive squares in only one way, i.e., 250114225 + 150626529 = 15815^2 + 12273^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (400740757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100185187 + ... + 100185190.

Almost surely, 2^400740754 is an apocalyptic number.

400740754 is a deficient number, since it is larger than the sum of its proper divisors (200370380).

400740754 is a wasteful number, since it uses less digits than its factorization.

400740754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200370379.

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 400740754 is about 20018.5102842344. The cubic root of 400740754 is about 737.2608460990.

Adding to 400740754 its reverse (457047004), we get a palindrome (857787758).

The spelling of 400740754 in words is "four hundred million, seven hundred forty thousand, seven hundred fifty-four".