402945106 has 4 divisors (see below), whose sum is σ = 604417662. Its totient is φ = 201472552.

The previous prime is 402945091. The next prime is 402945107. The reversal of 402945106 is 601549204.

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., 391446225 + 11498881 = 19785^2 + 3391^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (402945107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100736275 + ... + 100736278.

Almost surely, 2^402945106 is an apocalyptic number.

402945106 is a deficient number, since it is larger than the sum of its proper divisors (201472556).

402945106 is a wasteful number, since it uses less digits than its factorization.

402945106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201472555.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 402945106 is about 20073.4926208670. The cubic root of 402945106 is about 738.6101902829.

The spelling of 402945106 in words is "four hundred two million, nine hundred forty-five thousand, one hundred six".