840880080 has 60 divisors (see below), whose sum is σ = 2823958020. Its totient is φ = 224234496.

The previous prime is 840880067. The next prime is 840880091. The reversal of 840880080 is 80088048.

It can be written as a sum of positive squares in 2 ways, for example, as 233356176 + 607523904 = 15276^2 + 24648^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583225 + ... + 584664.

It is an arithmetic number, because the mean of its divisors is an integer number (47065967).

Almost surely, 2^840880080 is an apocalyptic number.

840880080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840880080 is an abundant number, since it is smaller than the sum of its proper divisors (1983077940).

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

840880080 is a wasteful number, since it uses less digits than its factorization.

840880080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167908 (or 1167899 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 840880080 is about 28997.9323400825. The cubic root of 840880080 is about 943.8682007413.

It can be divided in two parts, 8408 and 80080, that added together give a palindrome (88488).

The spelling of 840880080 in words is "eight hundred forty million, eight hundred eighty thousand, eighty".