402038402 has 4 divisors (see below), whose sum is σ = 603057606. Its totient is φ = 201019200.

The previous prime is 402038401. The next prime is 402038489. The reversal of 402038402 is 204830204.

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., 398042401 + 3996001 = 19951^2 + 1999^2 .

It is not an unprimeable number, because it can be changed into a prime (402038401) by changing a digit.

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, 100509599 + ... + 100509602.

Almost surely, 2^402038402 is an apocalyptic number.

402038402 is a deficient number, since it is larger than the sum of its proper divisors (201019204).

402038402 is a wasteful number, since it uses less digits than its factorization.

402038402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201019203.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 402038402 is about 20050.8952917320. The cubic root of 402038402 is about 738.0557692204.

Adding to 402038402 its reverse (204830204), we get a palindrome (606868606).

The spelling of 402038402 in words is "four hundred two million, thirty-eight thousand, four hundred two".