1990814730 has 64 divisors (see below), whose sum is σ = 4960051200. Its totient is φ = 510845760.

The previous prime is 1990814719. The next prime is 1990814747. The reversal of 1990814730 is 374180991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160491 + ... + 172449.

It is an arithmetic number, because the mean of its divisors is an integer number (77500800).

Almost surely, 2^1990814730 is an apocalyptic number.

1990814730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990814730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2480025600).

1990814730 is an abundant number, since it is smaller than the sum of its proper divisors (2969236470).

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

1990814730 is a wasteful number, since it uses less digits than its factorization.

1990814730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12179.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1990814730 is about 44618.5469283795. The cubic root of 1990814730 is about 1257.9893037645.

The spelling of 1990814730 in words is "one billion, nine hundred ninety million, eight hundred fourteen thousand, seven hundred thirty".