1990548972 has 48 divisors (see below), whose sum is σ = 5464257120. Its totient is φ = 624485376.

The previous prime is 1990548949. The next prime is 1990549013. The reversal of 1990548972 is 2798450991.

1990548972 is a `hidden beast` number, since 1 + 9 + 9 + 0 + 548 + 97 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540253 + ... + 543924.

It is an arithmetic number, because the mean of its divisors is an integer number (113838690).

Almost surely, 2^1990548972 is an apocalyptic number.

1990548972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990548972 is an abundant number, since it is smaller than the sum of its proper divisors (3473708148).

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

1990548972 is a wasteful number, since it uses less digits than its factorization.

1990548972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084207 (or 1084199 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 1990548972 is about 44615.5687176573. The cubic root of 1990548972 is about 1257.9333240704.

The spelling of 1990548972 in words is "one billion, nine hundred ninety million, five hundred forty-eight thousand, nine hundred seventy-two".