400853749 has 8 divisors (see below), whose sum is σ = 406058328. Its totient is φ = 395673600.

The previous prime is 400853743. The next prime is 400853759. The reversal of 400853749 is 947358004.

It can be written as a sum of positive squares in 4 ways, for example, as 154206724 + 246647025 = 12418^2 + 15705^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 400853749 - 2¹¹ = 400851701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400853743) 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, 28149 + ... + 39925.

It is an arithmetic number, because the mean of its divisors is an integer number (50757291).

Almost surely, 2^400853749 is an apocalyptic number.

It is an amenable number.

400853749 is a deficient number, since it is larger than the sum of its proper divisors (5204579).

400853749 is a wasteful number, since it uses less digits than its factorization.

400853749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12215.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 400853749 is about 20021.3323482729. The cubic root of 400853749 is about 737.3301335871.

It can be divided in two parts, 40085 and 3749, that added together give a palindrome (43834).

The spelling of 400853749 in words is "four hundred million, eight hundred fifty-three thousand, seven hundred forty-nine".