840611616 has 48 divisors (see below), whose sum is σ = 2376347904. Its totient is φ = 258649344.

The previous prime is 840611599. The next prime is 840611617. The reversal of 840611616 is 616116048.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (840611617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335536 + ... + 338031.

It is an arithmetic number, because the mean of its divisors is an integer number (49507248).

Almost surely, 2^840611616 is an apocalyptic number.

It is an amenable number.

840611616 is an abundant number, since it is smaller than the sum of its proper divisors (1535736288).

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

840611616 is a wasteful number, since it uses less digits than its factorization.

840611616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673593 (or 673585 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 840611616 is about 28993.3029508540. The cubic root of 840611616 is about 943.7677418649.

The spelling of 840611616 in words is "eight hundred forty million, six hundred eleven thousand, six hundred sixteen".