418402 has 4 divisors (see below), whose sum is σ = 627606. Its totient is φ = 209200.

The previous prime is 418391. The next prime is 418423. The reversal of 418402 is 204814.

418402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204814 = 2 ⋅102407.

It can be written as a sum of positive squares in only one way, i.e., 385641 + 32761 = 621^2 + 181^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 418402.

It is an unprimeable number.

418402 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 as a sum of consecutive naturals, namely, 104599 + ... + 104602.

2⁴¹⁸⁴⁰² is an apocalyptic number.

418402 is a deficient number, since it is larger than the sum of its proper divisors (209204).

418402 is a wasteful number, since it uses less digits than its factorization.

418402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209203.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 418402 is about 646.8400111310. The cubic root of 418402 is about 74.7936252396.

It can be divided in two parts, 418 and 402, that added together give a triangular number (820 = T₄₀).

The spelling of 418402 in words is "four hundred eighteen thousand, four hundred two".