912912820 has 24 divisors (see below), whose sum is σ = 1925081928. Its totient is φ = 363648000.

The previous prime is 912912809. The next prime is 912912829. The reversal of 912912820 is 28219219.

It can be written as a sum of positive squares in 4 ways, for example, as 38291344 + 874621476 = 6188^2 + 29574^2 .

It is a super-3 number, since 3×912912820³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (912912829) 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, 89881 + ... + 99520.

It is an arithmetic number, because the mean of its divisors is an integer number (80211747).

Almost surely, 2^912912820 is an apocalyptic number.

It is an amenable number.

912912820 is an abundant number, since it is smaller than the sum of its proper divisors (1012169108).

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

912912820 is a wasteful number, since it uses less digits than its factorization.

912912820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189651 (or 189649 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 912912820 is about 30214.4472065931. The cubic root of 912912820 is about 970.0849537668.

The spelling of 912912820 in words is "nine hundred twelve million, nine hundred twelve thousand, eight hundred twenty".