1640079470 has 8 divisors (see below), whose sum is σ = 2952143064. Its totient is φ = 656031784.

The previous prime is 1640079461. The next prime is 1640079479. The reversal of 1640079470 is 749700461.

It is an interprime number because it is at equal distance from previous prime (1640079461) and next prime (1640079479).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640079479) 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 3 ways as a sum of consecutive naturals, for example, 82003964 + ... + 82003983.

It is an arithmetic number, because the mean of its divisors is an integer number (369017883).

Almost surely, 2^1640079470 is an apocalyptic number.

1640079470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640079470 is a deficient number, since it is larger than the sum of its proper divisors (1312063594).

1640079470 is a wasteful number, since it uses less digits than its factorization.

1640079470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164007954.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 1640079470 is about 40497.8946366351. The cubic root of 1640079470 is about 1179.2927558331.

The spelling of 1640079470 in words is "one billion, six hundred forty million, seventy-nine thousand, four hundred seventy".