2728631394 has 32 divisors (see below), whose sum is σ = 6066642240. Its totient is φ = 909091296.

The previous prime is 2728631387. The next prime is 2728631413. The reversal of 2728631394 is 4931368272.

2728631394 is a `hidden beast` number, since 2 + 7 + 2 + 8 + 631 + 3 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107494 + ... + 130430.

It is an arithmetic number, because the mean of its divisors is an integer number (189582570).

Almost surely, 2^2728631394 is an apocalyptic number.

2728631394 is an abundant number, since it is smaller than the sum of its proper divisors (3338010846).

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

2728631394 is a wasteful number, since it uses less digits than its factorization.

2728631394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25151 (or 25145 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 2728631394 is about 52236.3034105592. The cubic root of 2728631394 is about 1397.3813966335.

The spelling of 2728631394 in words is "two billion, seven hundred twenty-eight million, six hundred thirty-one thousand, three hundred ninety-four".