3728428667 has 2 divisors, whose sum is σ = 3728428668. Its totient is φ = 3728428666.

The previous prime is 3728428651. The next prime is 3728428687. The reversal of 3728428667 is 7668248273.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3728428667 - 2⁴ = 3728428651 is a prime.

It is a super-3 number, since 3×3728428667³ (a number of 30 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (3728428607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1864214333 + 1864214334.

It is an arithmetic number, because the mean of its divisors is an integer number (1864214334).

Almost surely, 2^3728428667 is an apocalyptic number.

3728428667 is a deficient number, since it is larger than the sum of its proper divisors (1).

3728428667 is an equidigital number, since it uses as much as digits as its factorization.

3728428667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 53.

The square root of 3728428667 is about 61060.8603526023. The cubic root of 3728428667 is about 1550.6315382781.

The spelling of 3728428667 in words is "three billion, seven hundred twenty-eight million, four hundred twenty-eight thousand, six hundred sixty-seven".