802452780 has 36 divisors (see below), whose sum is σ = 2434107312. Its totient is φ = 213987360.

The previous prime is 802452767. The next prime is 802452787. The reversal of 802452780 is 87254208.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (802452787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2228856 + ... + 2229215.

It is an arithmetic number, because the mean of its divisors is an integer number (67614092).

Almost surely, 2^802452780 is an apocalyptic number.

It is an amenable number.

802452780 is an abundant number, since it is smaller than the sum of its proper divisors (1631654532).

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

802452780 is a wasteful number, since it uses less digits than its factorization.

802452780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458086 (or 4458081 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 802452780 is about 28327.5974978465. The cubic root of 802452780 is about 929.2655317951.

The spelling of 802452780 in words is "eight hundred two million, four hundred fifty-two thousand, seven hundred eighty".