4188266640 has 60 divisors (see below), whose sum is σ = 14065597884. Its totient is φ = 1116870912.

The previous prime is 4188266639. The next prime is 4188266651. The reversal of 4188266640 is 466628814.

It can be written as a sum of positive squares in 2 ways, for example, as 1823973264 + 2364293376 = 42708^2 + 48624^2 .

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 (45).

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, 2907799 + ... + 2909238.

Almost surely, 2^4188266640 is an apocalyptic number.

4188266640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4188266640 is an abundant number, since it is smaller than the sum of its proper divisors (9877331244).

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

4188266640 is a wasteful number, since it uses less digits than its factorization.

4188266640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5817056 (or 5817047 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 4188266640 is about 64716.8188340558. The cubic root of 4188266640 is about 1611.9247892467.

The spelling of 4188266640 in words is "four billion, one hundred eighty-eight million, two hundred sixty-six thousand, six hundred forty".