1628711397 has 24 divisors (see below), whose sum is σ = 2464285824. Its totient is φ = 1034614944.

The previous prime is 1628711389. The next prime is 1628711423. The reversal of 1628711397 is 7931178261.

1628711397 is a `hidden beast` number, since 1 + 628 + 7 + 1 + 13 + 9 + 7 = 666.

It is not a de Polignac number, because 1628711397 - 2³ = 1628711389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628711317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39483 + ... + 69399.

It is an arithmetic number, because the mean of its divisors is an integer number (102678576).

Almost surely, 2^1628711397 is an apocalyptic number.

It is an amenable number.

1628711397 is a deficient number, since it is larger than the sum of its proper divisors (835574427).

1628711397 is a wasteful number, since it uses less digits than its factorization.

1628711397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30209 (or 30206 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1628711397 is about 40357.2967008446. The cubic root of 1628711397 is about 1176.5617132093.

The spelling of 1628711397 in words is "one billion, six hundred twenty-eight million, seven hundred eleven thousand, three hundred ninety-seven".