2188369946 has 16 divisors (see below), whose sum is σ = 3807485376. Its totient is φ = 923874336.

The previous prime is 2188369927. The next prime is 2188369979. The reversal of 2188369946 is 6499638812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2188369891 and 2188369900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165571 + ... + 1167446.

It is an arithmetic number, because the mean of its divisors is an integer number (237967836).

Almost surely, 2^2188369946 is an apocalyptic number.

2188369946 is a deficient number, since it is larger than the sum of its proper divisors (1619115430).

2188369946 is a wasteful number, since it uses less digits than its factorization.

2188369946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333093.

The product of its digits is 4478976, while the sum is 56.

The square root of 2188369946 is about 46780.0165241527. The cubic root of 2188369946 is about 1298.2955860644.

The spelling of 2188369946 in words is "two billion, one hundred eighty-eight million, three hundred sixty-nine thousand, nine hundred forty-six".