1899701985 has 32 divisors (see below), whose sum is σ = 3309840000. Its totient is φ = 926747136.

The previous prime is 1899701983. The next prime is 1899702017. The reversal of 1899701985 is 5891079981.

1899701985 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1899701985 - 2¹ = 1899701983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1899701983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106660 + ... + 123189.

It is an arithmetic number, because the mean of its divisors is an integer number (103432500).

Almost surely, 2^1899701985 is an apocalyptic number.

1899701985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1899701985 is a deficient number, since it is larger than the sum of its proper divisors (1410138015).

1899701985 is a wasteful number, since it uses less digits than its factorization.

1899701985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229905.

The product of its (nonzero) digits is 1632960, while the sum is 57.

The square root of 1899701985 is about 43585.5708348531. The cubic root of 1899701985 is about 1238.4975700771.

The spelling of 1899701985 in words is "one billion, eight hundred ninety-nine million, seven hundred one thousand, nine hundred eighty-five".