402819 has 16 divisors (see below), whose sum is σ = 583680. Its totient is φ = 246240.

The previous prime is 402817. The next prime is 402823. The reversal of 402819 is 918204.

It is not a de Polignac number, because 402819 - 2¹ = 402817 is a prime.

It is a super-2 number, since 2×402819² = 324526293522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2014 + ... + 2204.

It is an arithmetic number, because the mean of its divisors is an integer number (36480).

2⁴⁰²⁸¹⁹ is an apocalyptic number.

402819 is a deficient number, since it is larger than the sum of its proper divisors (180861).

402819 is a wasteful number, since it uses less digits than its factorization.

402819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 402819 is about 634.6802344488. The cubic root of 402819 is about 73.8533130245.

It can be divided in two parts, 402 and 819, that added together give a palindrome (1221).

The spelling of 402819 in words is "four hundred two thousand, eight hundred nineteen".