400102 has 8 divisors (see below), whose sum is σ = 631800. Its totient is φ = 189504.

The previous prime is 400093. The next prime is 400109. The reversal of 400102 is 201004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×400102² = 320163220808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400109) by changing a digit.

400102 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 3 ways as a sum of consecutive naturals, for example, 5227 + ... + 5302.

It is an arithmetic number, because the mean of its divisors is an integer number (78975).

2⁴⁰⁰¹⁰² is an apocalyptic number.

400102 is a deficient number, since it is larger than the sum of its proper divisors (231698).

400102 is a wasteful number, since it uses less digits than its factorization.

400102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 400102 is about 632.5361649740. The cubic root of 400102 is about 73.6868922941.

Adding to 400102 its reverse (201004), we get a palindrome (601106).

The spelling of 400102 in words is "four hundred thousand, one hundred two", and thus it is an iban number.