1994547740 has 12 divisors (see below), whose sum is σ = 4188550296. Its totient is φ = 797819088.

The previous prime is 1994547739. The next prime is 1994547757. The reversal of 1994547740 is 477454991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49863674 + ... + 49863713.

It is an arithmetic number, because the mean of its divisors is an integer number (349045858).

Almost surely, 2^1994547740 is an apocalyptic number.

1994547740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1994547740 is an abundant number, since it is smaller than the sum of its proper divisors (2194002556).

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

1994547740 is a wasteful number, since it uses less digits than its factorization.

1994547740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99727396 (or 99727394 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 1994547740 is about 44660.3598283758. The cubic root of 1994547740 is about 1258.7751050744.

The spelling of 1994547740 in words is "one billion, nine hundred ninety-four million, five hundred forty-seven thousand, seven hundred forty".