402180 has 24 divisors (see below), whose sum is σ = 1126272. Its totient is φ = 107232.

The previous prime is 402139. The next prime is 402197. The reversal of 402180 is 81204.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

402180 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3292 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (46928).

2⁴⁰²¹⁸⁰ is an apocalyptic number.

It is an amenable number.

402180 is an abundant number, since it is smaller than the sum of its proper divisors (724092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402180 is a wasteful number, since it uses less digits than its factorization.

402180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715 (or 6713 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 402180 is about 634.1766315468. The cubic root of 402180 is about 73.8142406843.

Adding to 402180 its reverse (81204), we get a palindrome (483384).

The spelling of 402180 in words is "four hundred two thousand, one hundred eighty".