400352146 has 4 divisors (see below), whose sum is σ = 600528222. Its totient is φ = 200176072.

The previous prime is 400352137. The next prime is 400352153. The reversal of 400352146 is 641253004.

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., 338964921 + 61387225 = 18411^2 + 7835^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400352146.

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, 100088035 + ... + 100088038.

Almost surely, 2^400352146 is an apocalyptic number.

400352146 is a deficient number, since it is larger than the sum of its proper divisors (200176076).

400352146 is a wasteful number, since it uses less digits than its factorization.

400352146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200176075.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400352146 is about 20008.8017132461. The cubic root of 400352146 is about 737.0224558011.

The spelling of 400352146 in words is "four hundred million, three hundred fifty-two thousand, one hundred forty-six".