402042434 has 8 divisors (see below), whose sum is σ = 606763920. Its totient is φ = 199787796.

The previous prime is 402042391. The next prime is 402042493. The reversal of 402042434 is 434240204.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 616304 + ... + 616955.

It is an arithmetic number, because the mean of its divisors is an integer number (75845490).

Almost surely, 2^402042434 is an apocalyptic number.

402042434 is a deficient number, since it is larger than the sum of its proper divisors (204721486).

402042434 is a wasteful number, since it uses less digits than its factorization.

402042434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233424.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 402042434 is about 20050.9958356187. The cubic root of 402042434 is about 738.0582365062.

Adding to 402042434 its reverse (434240204), we get a palindrome (836282638).

The spelling of 402042434 in words is "four hundred two million, forty-two thousand, four hundred thirty-four".