402538 has 8 divisors (see below), whose sum is σ = 618660. Its totient is φ = 196320.

The previous prime is 402529. The next prime is 402541. The reversal of 402538 is 835204.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 1849 = 633^2 + 43^2 .

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, 2373 + ... + 2536.

2⁴⁰²⁵³⁸ is an apocalyptic number.

402538 is a deficient number, since it is larger than the sum of its proper divisors (216122).

402538 is a wasteful number, since it uses less digits than its factorization.

402538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402538 is about 634.4588245111. The cubic root of 402538 is about 73.8361360721.

The spelling of 402538 in words is "four hundred two thousand, five hundred thirty-eight".