2018402 has 4 divisors (see below), whose sum is σ = 3027606. Its totient is φ = 1009200.

The previous prime is 2018383. The next prime is 2018407. The reversal of 2018402 is 2048102.

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., 1934881 + 83521 = 1391^2 + 289^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504599 + ... + 504602.

2^2018402 is an apocalyptic number.

2018402 is a deficient number, since it is larger than the sum of its proper divisors (1009204).

2018402 is a wasteful number, since it uses less digits than its factorization.

2018402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009203.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2018402 is about 1420.7047546904. The cubic root of 2018402 is about 126.3773436533.

The spelling of 2018402 in words is "two million, eighteen thousand, four hundred two".