402750 has 48 divisors (see below), whose sum is σ = 1095120. Its totient is φ = 106800.

The previous prime is 402739. The next prime is 402751. The reversal of 402750 is 57204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402751) by changing a digit.

402750 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 23 ways as a sum of consecutive naturals, for example, 2161 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (22815).

2⁴⁰²⁷⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547560).

402750 is an abundant number, since it is smaller than the sum of its proper divisors (692370).

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

402750 is a wasteful number, since it uses less digits than its factorization.

402750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 402750 is about 634.6258740392. The cubic root of 402750 is about 73.8490959365.

Adding to 402750 its reverse (57204), we get a palindrome (459954).

The spelling of 402750 in words is "four hundred two thousand, seven hundred fifty".