1970538642 has 18 divisors (see below), whose sum is σ = 4269908487. Its totient is φ = 656783436.

The previous prime is 1970538641. The next prime is 1970538667. The reversal of 1970538642 is 2468350791.

1970538642 is a `hidden beast` number, since 1 + 9 + 70 + 538 + 6 + 42 = 666.

1970538642 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 985269321 + 985269321 = 31389^2 + 31389^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=31389.

1970538642 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (1970538641) 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 8 ways as a sum of consecutive naturals, for example, 183103 + ... + 193565.

It is a 1-persistent number, because it is pandigital, but 2⋅1970538642 = 3941077284 is not.

Almost surely, 2^1970538642 is an apocalyptic number.

1970538642 is an abundant number, since it is smaller than the sum of its proper divisors (2299369845).

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

1970538642 is an frugal number, since it uses more digits than its factorization.

1970538642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20934 (or 10468 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1970538642 is about 44390.7495093291. The cubic root of 1970538642 is about 1253.7039242093.

The spelling of 1970538642 in words is "one billion, nine hundred seventy million, five hundred thirty-eight thousand, six hundred forty-two".