3891628426 has 16 divisors (see below), whose sum is σ = 6709929984. Its totient is φ = 1658199024.

The previous prime is 3891628421. The next prime is 3891628427. The reversal of 3891628426 is 6248261983.

It is a self number, because there is not a number n which added to its sum of digits gives 3891628426.

It is not an unprimeable number, because it can be changed into a prime (3891628421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800970 + ... + 805813.

It is an arithmetic number, because the mean of its divisors is an integer number (419370624).

Almost surely, 2^3891628426 is an apocalyptic number.

3891628426 is a deficient number, since it is larger than the sum of its proper divisors (2818301558).

3891628426 is a wasteful number, since it uses less digits than its factorization.

3891628426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606965.

The product of its digits is 995328, while the sum is 49.

The square root of 3891628426 is about 62382.9177419588. The cubic root of 3891628426 is about 1572.9338390791.

The spelling of 3891628426 in words is "three billion, eight hundred ninety-one million, six hundred twenty-eight thousand, four hundred twenty-six".