3994126560 has 72 divisors (see below), whose sum is σ = 13629961800. Its totient is φ = 1065100032.

The previous prime is 3994126547. The next prime is 3994126613. The reversal of 3994126560 is 656214993.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1385410 + ... + 1388289.

It is an arithmetic number, because the mean of its divisors is an integer number (189305025).

Almost surely, 2^3994126560 is an apocalyptic number.

3994126560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3994126560 is an abundant number, since it is smaller than the sum of its proper divisors (9635835240).

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

3994126560 is a wasteful number, since it uses less digits than its factorization.

3994126560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773720 (or 2773709 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 3994126560 is about 63199.1025252733. The cubic root of 3994126560 is about 1586.6237126364.

The spelling of 3994126560 in words is "three billion, nine hundred ninety-four million, one hundred twenty-six thousand, five hundred sixty".