402098 has 4 divisors (see below), whose sum is σ = 603150. Its totient is φ = 201048.

The previous prime is 402091. The next prime is 402107. The reversal of 402098 is 890204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 332929 + 69169 = 577^2 + 263^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100523 + ... + 100526.

2⁴⁰²⁰⁹⁸ is an apocalyptic number.

402098 is a deficient number, since it is larger than the sum of its proper divisors (201052).

402098 is a wasteful number, since it uses less digits than its factorization.

402098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201051.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 402098 is about 634.1119774929. Note that the first 3 decimals coincide. The cubic root of 402098 is about 73.8092237109.

The spelling of 402098 in words is "four hundred two thousand, ninety-eight".