1628861026 has 32 divisors (see below), whose sum is σ = 2709907200. Its totient is φ = 729630720.

The previous prime is 1628861023. The next prime is 1628861033. The reversal of 1628861026 is 6201688261.

It is a self number, because there is not a number n which added to its sum of digits gives 1628861026.

It is not an unprimeable number, because it can be changed into a prime (1628861021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114466 + ... + 127906.

It is an arithmetic number, because the mean of its divisors is an integer number (84684600).

Almost surely, 2^1628861026 is an apocalyptic number.

1628861026 is a deficient number, since it is larger than the sum of its proper divisors (1081046174).

1628861026 is a wasteful number, since it uses less digits than its factorization.

1628861026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1628861026 is about 40359.1504618222. The cubic root of 1628861026 is about 1176.5977421751.

The spelling of 1628861026 in words is "one billion, six hundred twenty-eight million, eight hundred sixty-one thousand, twenty-six".