994081780 has 24 divisors (see below), whose sum is σ = 2126962152. Its totient is φ = 390129792.

The previous prime is 994081771. The next prime is 994081789. The reversal of 994081780 is 87180499.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (994081771) and next prime (994081789).

It can be written as a sum of positive squares in 4 ways, for example, as 35188624 + 958893156 = 5932^2 + 30966^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 994081780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994081789) 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 7 ways as a sum of consecutive naturals, for example, 467847 + ... + 469966.

It is an arithmetic number, because the mean of its divisors is an integer number (88623423).

Almost surely, 2^994081780 is an apocalyptic number.

It is an amenable number.

994081780 is an abundant number, since it is smaller than the sum of its proper divisors (1132880372).

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

994081780 is a wasteful number, since it uses less digits than its factorization.

994081780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937875 (or 937873 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 994081780 is about 31529.0624662390. The cubic root of 994081780 is about 998.0233554507.

The spelling of 994081780 in words is "nine hundred ninety-four million, eighty-one thousand, seven hundred eighty".