1628806090 has 8 divisors (see below), whose sum is σ = 2931850980. Its totient is φ = 651522432.

The previous prime is 1628806051. The next prime is 1628806129. The reversal of 1628806090 is 906088261.

It is an interprime number because it is at equal distance from previous prime (1628806051) and next prime (1628806129).

It can be written as a sum of positive squares in 2 ways, for example, as 1403776089 + 225030001 = 37467^2 + 15001^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81440295 + ... + 81440314.

Almost surely, 2^1628806090 is an apocalyptic number.

1628806090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1628806090 is a deficient number, since it is larger than the sum of its proper divisors (1303044890).

1628806090 is a wasteful number, since it uses less digits than its factorization.

1628806090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162880616.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1628806090 is about 40358.4698669313. The cubic root of 1628806090 is about 1176.5845144659.

The spelling of 1628806090 in words is "one billion, six hundred twenty-eight million, eight hundred six thousand, ninety".