802178540 has 12 divisors (see below), whose sum is σ = 1684574976. Its totient is φ = 320871408.

The previous prime is 802178539. The next prime is 802178549. The reversal of 802178540 is 45871208.

It is a self number, because there is not a number n which added to its sum of digits gives 802178540.

It is not an unprimeable number, because it can be changed into a prime (802178549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20054444 + ... + 20054483.

It is an arithmetic number, because the mean of its divisors is an integer number (140381248).

Almost surely, 2^802178540 is an apocalyptic number.

It is an amenable number.

802178540 is an abundant number, since it is smaller than the sum of its proper divisors (882396436).

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

802178540 is a wasteful number, since it uses less digits than its factorization.

802178540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40108936 (or 40108934 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 802178540 is about 28322.7565748816. The cubic root of 802178540 is about 929.1596602214.

The spelling of 802178540 in words is "eight hundred two million, one hundred seventy-eight thousand, five hundred forty".