3993428690 has 32 divisors (see below), whose sum is σ = 7638182064. Its totient is φ = 1498040320.

The previous prime is 3993428687. The next prime is 3993428693. The reversal of 3993428690 is 968243993.

3993428690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3993428687) and next prime (3993428693).

It can be written as a sum of positive squares in 8 ways, for example, as 2714722609 + 1278706081 = 52103^2 + 35759^2 .

It is a super-2 number, since 2×3993428690² = 31894945404230232200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3993428693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5972 + ... + 89568.

Almost surely, 2^3993428690 is an apocalyptic number.

3993428690 is a deficient number, since it is larger than the sum of its proper divisors (3644753374).

3993428690 is a wasteful number, since it uses less digits than its factorization.

3993428690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83902.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The square root of 3993428690 is about 63193.5810822587. The cubic root of 3993428690 is about 1586.5313001429.

The spelling of 3993428690 in words is "three billion, nine hundred ninety-three million, four hundred twenty-eight thousand, six hundred ninety".