1820528916 has 12 divisors (see below), whose sum is σ = 4247900832. Its totient is φ = 606842968.

The previous prime is 1820528903. The next prime is 1820528917. The reversal of 1820528916 is 6198250281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820528917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75855360 + ... + 75855383.

It is an arithmetic number, because the mean of its divisors is an integer number (353991736).

Almost surely, 2^1820528916 is an apocalyptic number.

It is an amenable number.

1820528916 is an abundant number, since it is smaller than the sum of its proper divisors (2427371916).

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

1820528916 is a wasteful number, since it uses less digits than its factorization.

1820528916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151710750 (or 151710748 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 1820528916 is about 42667.6565562253. The cubic root of 1820528916 is about 1221.0474109951.

The spelling of 1820528916 in words is "one billion, eight hundred twenty million, five hundred twenty-eight thousand, nine hundred sixteen".