400165375 has 16 divisors (see below), whose sum is σ = 501291648. Its totient is φ = 318924000.

The previous prime is 400165373. The next prime is 400165387. The reversal of 400165375 is 573561004.

It is not a de Polignac number, because 400165375 - 2¹ = 400165373 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 (400165373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27969 + ... + 39781.

It is an arithmetic number, because the mean of its divisors is an integer number (31330728).

Almost surely, 2^400165375 is an apocalyptic number.

400165375 is a deficient number, since it is larger than the sum of its proper divisors (101126273).

400165375 is a wasteful number, since it uses less digits than its factorization.

400165375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099 (or 12089 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 400165375 is about 20004.1339477619. The cubic root of 400165375 is about 736.9078268558.

The spelling of 400165375 in words is "four hundred million, one hundred sixty-five thousand, three hundred seventy-five".