402166274 has 12 divisors (see below), whose sum is σ = 636671574. Its totient is φ = 190499472.

The previous prime is 402166273. The next prime is 402166309. The reversal of 402166274 is 472661204.

It can be written as a sum of positive squares in only one way, i.e., 232776049 + 169390225 = 15257^2 + 13015^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402166274.

It is not an unprimeable number, because it can be changed into a prime (402166273) 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 5 ways as a sum of consecutive naturals, for example, 277787 + ... + 279230.

Almost surely, 2^402166274 is an apocalyptic number.

402166274 is a deficient number, since it is larger than the sum of its proper divisors (234505300).

402166274 is a wasteful number, since it uses less digits than its factorization.

402166274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557057 (or 557038 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 402166274 is about 20054.0837237706. The cubic root of 402166274 is about 738.1340093942.

The spelling of 402166274 in words is "four hundred two million, one hundred sixty-six thousand, two hundred seventy-four".