845190420 has 48 divisors (see below), whose sum is σ = 2369810688. Its totient is φ = 225072000.

The previous prime is 845190389. The next prime is 845190421. The reversal of 845190420 is 24091548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845190421) 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 15 ways as a sum of consecutive naturals, for example, 35682 + ... + 54438.

It is an arithmetic number, because the mean of its divisors is an integer number (49371056).

Almost surely, 2^845190420 is an apocalyptic number.

It is an amenable number.

845190420 is an abundant number, since it is smaller than the sum of its proper divisors (1524620268).

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

845190420 is a wasteful number, since it uses less digits than its factorization.

845190420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19520 (or 19518 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 845190420 is about 29072.1588465666. The cubic root of 845190420 is about 945.4782048219.

The spelling of 845190420 in words is "eight hundred forty-five million, one hundred ninety thousand, four hundred twenty".