1899426628 has 12 divisors (see below), whose sum is σ = 3626178192. Its totient is φ = 863375720.

The previous prime is 1899426623. The next prime is 1899426629. The reversal of 1899426628 is 8266249981.

It is not an unprimeable number, because it can be changed into a prime (1899426623) 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, 21584350 + ... + 21584437.

It is an arithmetic number, because the mean of its divisors is an integer number (302181516).

Almost surely, 2^1899426628 is an apocalyptic number.

It is an amenable number.

1899426628 is a deficient number, since it is larger than the sum of its proper divisors (1726751564).

1899426628 is a wasteful number, since it uses less digits than its factorization.

1899426628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43168802 (or 43168800 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 1899426628 is about 43582.4119112286. The cubic root of 1899426628 is about 1238.4377281551.

The spelling of 1899426628 in words is "one billion, eight hundred ninety-nine million, four hundred twenty-six thousand, six hundred twenty-eight".