1628900099 has 4 divisors (see below), whose sum is σ = 1672924464. Its totient is φ = 1584875736.

The previous prime is 1628900093. The next prime is 1628900113. The reversal of 1628900099 is 9900098261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9900098261 = 1129 ⋅8768909.

It is a cyclic number.

It is not a de Polignac number, because 1628900099 - 2⁸ = 1628899843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628900093) 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, 22012127 + ... + 22012200.

It is an arithmetic number, because the mean of its divisors is an integer number (418231116).

Almost surely, 2^1628900099 is an apocalyptic number.

1628900099 is a deficient number, since it is larger than the sum of its proper divisors (44024365).

1628900099 is an equidigital number, since it uses as much as digits as its factorization.

1628900099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44024364.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1628900099 is about 40359.6345251044. The cubic root of 1628900099 is about 1176.6071501470.

The spelling of 1628900099 in words is "one billion, six hundred twenty-eight million, nine hundred thousand, ninety-nine".