840648880 has 40 divisors (see below), whose sum is σ = 2007340272. Its totient is φ = 327170304.

The previous prime is 840648829. The next prime is 840648881. The reversal of 840648880 is 88846048.

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

It is a self number, because there is not a number n which added to its sum of digits gives 840648880.

It is not an unprimeable number, because it can be changed into a prime (840648881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139042 + ... + 144961.

Almost surely, 2^840648880 is an apocalyptic number.

840648880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

840648880 is an abundant number, since it is smaller than the sum of its proper divisors (1166691392).

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

840648880 is a wasteful number, since it uses less digits than its factorization.

840648880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284053 (or 284047 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 46.

The square root of 840648880 is about 28993.9455748955. The cubic root of 840648880 is about 943.7816872831.

The spelling of 840648880 in words is "eight hundred forty million, six hundred forty-eight thousand, eight hundred eighty".