2118402 has 48 divisors (see below), whose sum is σ = 5398848. Its totient is φ = 591840.

The previous prime is 2118397. The next prime is 2118419. The reversal of 2118402 is 2048112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2163 + ... + 2985.

It is an arithmetic number, because the mean of its divisors is an integer number (112476).

2^2118402 is an apocalyptic number.

2118402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2699424).

2118402 is an abundant number, since it is smaller than the sum of its proper divisors (3280446).

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

2118402 is a wasteful number, since it uses less digits than its factorization.

2118402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2118402 is about 1455.4731189548. The cubic root of 2118402 is about 128.4308802776.

The spelling of 2118402 in words is "two million, one hundred eighteen thousand, four hundred two".