400720170 has 16 divisors (see below), whose sum is σ = 961728480. Its totient is φ = 106858704.

The previous prime is 400720169. The next prime is 400720171. The reversal of 400720170 is 71027004.

It is an interprime number because it is at equal distance from previous prime (400720169) and next prime (400720171).

It is not an unprimeable number, because it can be changed into a prime (400720171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6678640 + ... + 6678699.

It is an arithmetic number, because the mean of its divisors is an integer number (60108030).

Almost surely, 2^400720170 is an apocalyptic number.

400720170 is an abundant number, since it is smaller than the sum of its proper divisors (561008310).

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

400720170 is a wasteful number, since it uses less digits than its factorization.

400720170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357349.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 400720170 is about 20017.9961534615. The cubic root of 400720170 is about 737.2482227784.

Adding to 400720170 its reverse (71027004), we get a palindrome (471747174).

The spelling of 400720170 in words is "four hundred million, seven hundred twenty thousand, one hundred seventy".