1640416390 has 8 divisors (see below), whose sum is σ = 2952749520. Its totient is φ = 656166552.

The previous prime is 1640416381. The next prime is 1640416391. The reversal of 1640416390 is 936140461.

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 (1640416391) 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, 82020810 + ... + 82020829.

It is an arithmetic number, because the mean of its divisors is an integer number (369093690).

Almost surely, 2^1640416390 is an apocalyptic number.

1640416390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640416390 is a deficient number, since it is larger than the sum of its proper divisors (1312333130).

1640416390 is a wasteful number, since it uses less digits than its factorization.

1640416390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164041646.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1640416390 is about 40502.0541454381. The cubic root of 1640416390 is about 1179.3735039753.

The spelling of 1640416390 in words is "one billion, six hundred forty million, four hundred sixteen thousand, three hundred ninety".