2028399994 has 16 divisors (see below), whose sum is σ = 3143681280. Its totient is φ = 981045520.

The previous prime is 2028399991. The next prime is 2028400007. The reversal of 2028399994 is 4999938202.

It is a super-2 number, since 2×2028399994² = 8228813071318400072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2028399991) 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, 127234 + ... + 142285.

It is an arithmetic number, because the mean of its divisors is an integer number (196480080).

Almost surely, 2^2028399994 is an apocalyptic number.

2028399994 is a deficient number, since it is larger than the sum of its proper divisors (1115281286).

2028399994 is a wasteful number, since it uses less digits than its factorization.

2028399994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269645.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 2028399994 is about 45037.7618671266. The cubic root of 2028399994 is about 1265.8566677182.

The spelling of 2028399994 in words is "two billion, twenty-eight million, three hundred ninety-nine thousand, nine hundred ninety-four".