1999754140 has 12 divisors (see below), whose sum is σ = 4199483736. Its totient is φ = 799901648.

The previous prime is 1999754117. The next prime is 1999754153. The reversal of 1999754140 is 414579991.

It is a congruent number.

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, 49993834 + ... + 49993873.

It is an arithmetic number, because the mean of its divisors is an integer number (349956978).

Almost surely, 2^1999754140 is an apocalyptic number.

1999754140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999754140 is an abundant number, since it is smaller than the sum of its proper divisors (2199729596).

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

1999754140 is a wasteful number, since it uses less digits than its factorization.

1999754140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99987716 (or 99987714 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1999754140 is about 44718.6106671484. The cubic root of 1999754140 is about 1259.8694204143.

The spelling of 1999754140 in words is "one billion, nine hundred ninety-nine million, seven hundred fifty-four thousand, one hundred forty".