402031442 has 8 divisors (see below), whose sum is σ = 603872076. Its totient is φ = 200740752.

The previous prime is 402031439. The next prime is 402031459. The reversal of 402031442 is 244130204.

It can be written as a sum of positive squares in 2 ways, for example, as 387735481 + 14295961 = 19691^2 + 3781^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135653 + ... + 138584.

Almost surely, 2^402031442 is an apocalyptic number.

402031442 is a deficient number, since it is larger than the sum of its proper divisors (201840634).

402031442 is a wasteful number, since it uses less digits than its factorization.

402031442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274972.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402031442 is about 20050.7217326459. The cubic root of 402031442 is about 738.0515101763.

Adding to 402031442 its reverse (244130204), we get a palindrome (646161646).

The spelling of 402031442 in words is "four hundred two million, thirty-one thousand, four hundred forty-two".