1994554530 has 40 divisors (see below), whose sum is σ = 5363137692. Its totient is φ = 531880992.

The previous prime is 1994554519. The next prime is 1994554537. The reversal of 1994554530 is 354554991.

1994554530 is a `hidden beast` number, since 1 + 9 + 94 + 554 + 5 + 3 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1982297529 + 12257001 = 44523^2 + 3501^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1994554537) 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 19 ways as a sum of consecutive naturals, for example, 1230397 + ... + 1232016.

Almost surely, 2^1994554530 is an apocalyptic number.

1994554530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1994554530 is an abundant number, since it is smaller than the sum of its proper divisors (3368583162).

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

1994554530 is a wasteful number, since it uses less digits than its factorization.

1994554530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462432 (or 2462423 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The square root of 1994554530 is about 44660.4358465074. The cubic root of 1994554530 is about 1258.7765334806.

The spelling of 1994554530 in words is "one billion, nine hundred ninety-four million, five hundred fifty-four thousand, five hundred thirty".