845993640 has 32 divisors (see below), whose sum is σ = 2537981280. Its totient is φ = 225598272.

The previous prime is 845993633. The next prime is 845993647. The reversal of 845993640 is 46399548.

845993640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (845993633) and next prime (845993647).

It is a self number, because there is not a number n which added to its sum of digits gives 845993640.

It is not an unprimeable number, because it can be changed into a prime (845993647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3524854 + ... + 3525093.

It is an arithmetic number, because the mean of its divisors is an integer number (79311915).

Almost surely, 2^845993640 is an apocalyptic number.

It is an amenable number.

845993640 is an abundant number, since it is smaller than the sum of its proper divisors (1691987640).

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

845993640 is a wasteful number, since it uses less digits than its factorization.

845993640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7049961 (or 7049957 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 845993640 is about 29085.9698136404. The cubic root of 845993640 is about 945.7776192264. Note that the first 3 decimals are identical.

The spelling of 845993640 in words is "eight hundred forty-five million, nine hundred ninety-three thousand, six hundred forty".