1640304120 has 128 divisors (see below), whose sum is σ = 6056547840. Its totient is φ = 346083840.

The previous prime is 1640304103. The next prime is 1640304121. The reversal of 1640304120 is 214030461.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640304121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64186 + ... + 86025.

It is an arithmetic number, because the mean of its divisors is an integer number (47316780).

Almost surely, 2^1640304120 is an apocalyptic number.

1640304120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1640304120 is an abundant number, since it is smaller than the sum of its proper divisors (4416243720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640304120 is a wasteful number, since it uses less digits than its factorization.

1640304120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150245 (or 150241 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1640304120 is about 40500.6681426369. The cubic root of 1640304120 is about 1179.3465979440.

Adding to 1640304120 its reverse (214030461), we get a palindrome (1854334581).

The spelling of 1640304120 in words is "one billion, six hundred forty million, three hundred four thousand, one hundred twenty".