1640124730 has 16 divisors (see below), whose sum is σ = 2959939584. Its totient is φ = 654335440.

The previous prime is 1640124727. The next prime is 1640124749. The reversal of 1640124730 is 374210461.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 210286 + ... + 217945.

It is an arithmetic number, because the mean of its divisors is an integer number (184996224).

Almost surely, 2^1640124730 is an apocalyptic number.

1640124730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640124730 is a deficient number, since it is larger than the sum of its proper divisors (1319814854).

1640124730 is a wasteful number, since it uses less digits than its factorization.

1640124730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428621.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1640124730 is about 40498.4534272607. The cubic root of 1640124730 is about 1179.3036037422.

The spelling of 1640124730 in words is "one billion, six hundred forty million, one hundred twenty-four thousand, seven hundred thirty".