402540946 has 4 divisors (see below), whose sum is σ = 603811422. Its totient is φ = 201270472.

The previous prime is 402540881. The next prime is 402540959. The reversal of 402540946 is 649045204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 364237225 + 38303721 = 19085^2 + 6189^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 100635235 + ... + 100635238.

Almost surely, 2^402540946 is an apocalyptic number.

402540946 is a deficient number, since it is larger than the sum of its proper divisors (201270476).

402540946 is a wasteful number, since it uses less digits than its factorization.

402540946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201270475.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 402540946 is about 20063.4230877984. The cubic root of 402540946 is about 738.3631619646.

The spelling of 402540946 in words is "four hundred two million, five hundred forty thousand, nine hundred forty-six".