1640030356 has 6 divisors (see below), whose sum is σ = 2870053130. Its totient is φ = 820015176.

The previous prime is 1640030351. The next prime is 1640030369. The reversal of 1640030356 is 6530300461.

It can be written as a sum of positive squares in only one way, i.e., 1481018256 + 159012100 = 38484^2 + 12610^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640030351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205003791 + ... + 205003798.

Almost surely, 2^1640030356 is an apocalyptic number.

It is an amenable number.

1640030356 is a deficient number, since it is larger than the sum of its proper divisors (1230022774).

1640030356 is a wasteful number, since it uses less digits than its factorization.

1640030356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410007593 (or 410007591 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1640030356 is about 40497.2882548943. The cubic root of 1640030356 is about 1179.2809839721.

The spelling of 1640030356 in words is "one billion, six hundred forty million, thirty thousand, three hundred fifty-six".