1999769148 has 60 divisors (see below), whose sum is σ = 5629941240. Its totient is φ = 615312288.

The previous prime is 1999769119. The next prime is 1999769159. The reversal of 1999769148 is 8419679991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 233178 + ... + 241601.

It is an arithmetic number, because the mean of its divisors is an integer number (93832354).

Almost surely, 2^1999769148 is an apocalyptic number.

1999769148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1999769148 is an abundant number, since it is smaller than the sum of its proper divisors (3630172092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999769148 is a wasteful number, since it uses less digits than its factorization.

1999769148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474808 (or 474797 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 63.

The square root of 1999769148 is about 44718.7784716890. The cubic root of 1999769148 is about 1259.8725721473.

The spelling of 1999769148 in words is "one billion, nine hundred ninety-nine million, seven hundred sixty-nine thousand, one hundred forty-eight".