2009866402 has 16 divisors (see below), whose sum is σ = 3165312960. Its totient is φ = 955796688.

The previous prime is 2009866393. The next prime is 2009866403. The reversal of 2009866402 is 2046689002.

It is not an unprimeable number, because it can be changed into a prime (2009866403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254718 + ... + 262489.

It is an arithmetic number, because the mean of its divisors is an integer number (197832060).

Almost surely, 2^2009866402 is an apocalyptic number.

2009866402 is a deficient number, since it is larger than the sum of its proper divisors (1155446558).

2009866402 is a wasteful number, since it uses less digits than its factorization.

2009866402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517305.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 2009866402 is about 44831.5335673452. The cubic root of 2009866402 is about 1261.9894669032.

The spelling of 2009866402 in words is "two billion, nine million, eight hundred sixty-six thousand, four hundred two".