1720315938 has 32 divisors (see below), whose sum is σ = 3757178880. Its totient is φ = 520785360.

The previous prime is 1720315937. The next prime is 1720315943. The reversal of 1720315938 is 8395130271.

It is a junction number, because it is equal to n+sod(n) for n = 1720315896 and 1720315905.

It is not an unprimeable number, because it can be changed into a prime (1720315937) 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 15 ways as a sum of consecutive naturals, for example, 56031 + ... + 81117.

It is an arithmetic number, because the mean of its divisors is an integer number (117411840).

Almost surely, 2^1720315938 is an apocalyptic number.

1720315938 is an abundant number, since it is smaller than the sum of its proper divisors (2036862942).

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

1720315938 is a wasteful number, since it uses less digits than its factorization.

1720315938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26142.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1720315938 is about 41476.6915025777. The cubic root of 1720315938 is about 1198.2186388801.

The spelling of 1720315938 in words is "one billion, seven hundred twenty million, three hundred fifteen thousand, nine hundred thirty-eight".