3997494628 has 6 divisors (see below), whose sum is σ = 6995615606. Its totient is φ = 1998747312.

The previous prime is 3997494617. The next prime is 3997494643. The reversal of 3997494628 is 8264947993.

It can be written as a sum of positive squares in only one way, i.e., 3997021284 + 473344 = 63222^2 + 688^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499686825 + ... + 499686832.

Almost surely, 2^3997494628 is an apocalyptic number.

It is an amenable number.

3997494628 is a deficient number, since it is larger than the sum of its proper divisors (2998120978).

3997494628 is a wasteful number, since it uses less digits than its factorization.

3997494628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999373661 (or 999373659 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 61.

The square root of 3997494628 is about 63225.7433961832. The cubic root of 3997494628 is about 1587.0695635711.

The spelling of 3997494628 in words is "three billion, nine hundred ninety-seven million, four hundred ninety-four thousand, six hundred twenty-eight".