1628428886 has 8 divisors (see below), whose sum is σ = 2791592400. Its totient is φ = 697898088.

The previous prime is 1628428883. The next prime is 1628428931. The reversal of 1628428886 is 6888248261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628428883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58158161 + ... + 58158188.

It is an arithmetic number, because the mean of its divisors is an integer number (348949050).

Almost surely, 2^1628428886 is an apocalyptic number.

1628428886 is a deficient number, since it is larger than the sum of its proper divisors (1163163514).

1628428886 is a wasteful number, since it uses less digits than its factorization.

1628428886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116316358.

The product of its digits is 2359296, while the sum is 53.

The square root of 1628428886 is about 40353.7964261109. The cubic root of 1628428886 is about 1176.4936817485.

The spelling of 1628428886 in words is "one billion, six hundred twenty-eight million, four hundred twenty-eight thousand, eight hundred eighty-six".