845973840 has 40 divisors (see below), whose sum is σ = 2622519648. Its totient is φ = 225592960.

The previous prime is 845973829. The next prime is 845973853. The reversal of 845973840 is 48379548.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 845973840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1762206 + ... + 1762685.

Almost surely, 2^845973840 is an apocalyptic number.

845973840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

845973840 is an abundant number, since it is smaller than the sum of its proper divisors (1776545808).

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

845973840 is a wasteful number, since it uses less digits than its factorization.

845973840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524907 (or 3524901 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 845973840 is about 29085.6294413581. The cubic root of 845973840 is about 945.7702407064.

The spelling of 845973840 in words is "eight hundred forty-five million, nine hundred seventy-three thousand, eight hundred forty".