1990994652 has 72 divisors (see below), whose sum is σ = 5222708400. Its totient is φ = 638765568.

The previous prime is 1990994647. The next prime is 1990994653. The reversal of 1990994652 is 2564990991.

1990994652 is a `hidden beast` number, since 1 + 9 + 90 + 99 + 465 + 2 = 666.

It is a super-2 number, since 2×1990994652² = 7928119408585202208, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990994653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 348999 + ... + 354657.

Almost surely, 2^1990994652 is an apocalyptic number.

1990994652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990994652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2611354200).

1990994652 is an abundant number, since it is smaller than the sum of its proper divisors (3231713748).

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

1990994652 is a wasteful number, since it uses less digits than its factorization.

1990994652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035 (or 6030 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The square root of 1990994652 is about 44620.5631071595. The cubic root of 1990994652 is about 1258.0271999969.

The spelling of 1990994652 in words is "one billion, nine hundred ninety million, nine hundred ninety-four thousand, six hundred fifty-two".