845190780 has 96 divisors (see below), whose sum is σ = 2709106176. Its totient is φ = 192865536.

The previous prime is 845190767. The next prime is 845190791. The reversal of 845190780 is 87091548.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329262 + ... + 331818.

It is an arithmetic number, because the mean of its divisors is an integer number (28219856).

Almost surely, 2^845190780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845190780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354553088).

845190780 is an abundant number, since it is smaller than the sum of its proper divisors (1863915396).

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

845190780 is a wasteful number, since it uses less digits than its factorization.

845190780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3361 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 845190780 is about 29072.1650380566. The cubic root of 845190780 is about 945.4783390607.

The spelling of 845190780 in words is "eight hundred forty-five million, one hundred ninety thousand, seven hundred eighty".