1990518552 has 48 divisors (see below), whose sum is σ = 5881079880. Its totient is φ = 603187200.

The previous prime is 1990518529. The next prime is 1990518557. The reversal of 1990518552 is 2558150991.

1990518552 is a `hidden beast` number, since 1 + 9 + 90 + 5 + 1 + 8 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1990518498 and 1990518507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990518557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1255849 + ... + 1257432.

Almost surely, 2^1990518552 is an apocalyptic number.

1990518552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990518552 is an abundant number, since it is smaller than the sum of its proper divisors (3890561328).

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

1990518552 is a wasteful number, since it uses less digits than its factorization.

1990518552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513304 (or 2513297 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 45.

The square root of 1990518552 is about 44615.2278039685. The cubic root of 1990518552 is about 1257.9269160347.

The spelling of 1990518552 in words is "one billion, nine hundred ninety million, five hundred eighteen thousand, five hundred fifty-two".