402893 has 4 divisors (see below), whose sum is σ = 413820. Its totient is φ = 391968.

The previous prime is 402881. The next prime is 402923. The reversal of 402893 is 398204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 232324 = 413^2 + 482^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402893 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5408 + ... + 5481.

It is an arithmetic number, because the mean of its divisors is an integer number (103455).

2⁴⁰²⁸⁹³ is an apocalyptic number.

It is an amenable number.

402893 is a deficient number, since it is larger than the sum of its proper divisors (10927).

402893 is a wasteful number, since it uses less digits than its factorization.

402893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10926.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 402893 is about 634.7385288448. The cubic root of 402893 is about 73.8578351635.

The spelling of 402893 in words is "four hundred two thousand, eight hundred ninety-three".