1384931645 has 16 divisors (see below), whose sum is σ = 1710673968. Its totient is φ = 1075576320.

The previous prime is 1384931633. The next prime is 1384931651. The reversal of 1384931645 is 5461394831.

It can be written as a sum of positive squares in 8 ways, for example, as 942841 + 1383988804 = 971^2 + 37202^2 .

It is not a de Polignac number, because 1384931645 - 2⁸ = 1384931389 is a prime.

It is a super-2 number, since 2×1384931645² = 3836071322644812050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1384931596 and 1384931605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76355 + ... + 92735.

It is an arithmetic number, because the mean of its divisors is an integer number (106917123).

Almost surely, 2^1384931645 is an apocalyptic number.

It is an amenable number.

1384931645 is a deficient number, since it is larger than the sum of its proper divisors (325742323).

1384931645 is a wasteful number, since it uses less digits than its factorization.

1384931645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16880.

The product of its digits is 311040, while the sum is 44.

The square root of 1384931645 is about 37214.6697553532. The cubic root of 1384931645 is about 1114.6609317094.

The spelling of 1384931645 in words is "one billion, three hundred eighty-four million, nine hundred thirty-one thousand, six hundred forty-five".