400240740 has 48 divisors (see below), whose sum is σ = 1126339200. Its totient is φ = 106191360.

The previous prime is 400240739. The next prime is 400240747. The reversal of 400240740 is 47042004.

It is not an unprimeable number, because it can be changed into a prime (400240747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4821 + ... + 28700.

It is an arithmetic number, because the mean of its divisors is an integer number (23465400).

Almost surely, 2^400240740 is an apocalyptic number.

It is an amenable number.

400240740 is an abundant number, since it is smaller than the sum of its proper divisors (726098460).

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

400240740 is a wasteful number, since it uses less digits than its factorization.

400240740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33732 (or 33730 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 400240740 is about 20006.0175947138. The cubic root of 400240740 is about 736.9540857075.

Adding to 400240740 its reverse (47042004), we get a palindrome (447282744).

The spelling of 400240740 in words is "four hundred million, two hundred forty thousand, seven hundred forty".