3500678720 has 224 divisors, whose sum is σ = 10730520576. Its totient is φ = 1055692800.

The previous prime is 3500678659. The next prime is 3500678723. The reversal of 3500678720 is 278760053.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (3500678723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 761549 + ... + 766131.

Almost surely, 2^3500678720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3500678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5365260288).

3500678720 is an abundant number, since it is smaller than the sum of its proper divisors (7229841856).

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

3500678720 is a wasteful number, since it uses less digits than its factorization.

3500678720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649 (or 4639 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 3500678720 is about 59166.5337838883. The cubic root of 3500678720 is about 1518.3926221502.

The spelling of 3500678720 in words is "three billion, five hundred million, six hundred seventy-eight thousand, seven hundred twenty".