1992458540 has 12 divisors (see below), whose sum is σ = 4184162976. Its totient is φ = 796983408.

The previous prime is 1992458539. The next prime is 1992458581. The reversal of 1992458540 is 458542991.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49811444 + ... + 49811483.

It is an arithmetic number, because the mean of its divisors is an integer number (348680248).

Almost surely, 2^1992458540 is an apocalyptic number.

1992458540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1992458540 is an abundant number, since it is smaller than the sum of its proper divisors (2191704436).

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

1992458540 is a wasteful number, since it uses less digits than its factorization.

1992458540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99622936 (or 99622934 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 1992458540 is about 44636.9638304399. The cubic root of 1992458540 is about 1258.3354478959.

The spelling of 1992458540 in words is "one billion, nine hundred ninety-two million, four hundred fifty-eight thousand, five hundred forty".