1970727894 has 80 divisors (see below), whose sum is σ = 4544527680. Its totient is φ = 637925760.

The previous prime is 1970727893. The next prime is 1970727919. The reversal of 1970727894 is 4987270791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1970727894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970727893) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1786147 + ... + 1787249.

It is an arithmetic number, because the mean of its divisors is an integer number (56806596).

Almost surely, 2^1970727894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1970727894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2272263840).

1970727894 is an abundant number, since it is smaller than the sum of its proper divisors (2573799786).

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

1970727894 is a wasteful number, since it uses less digits than its factorization.

1970727894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The square root of 1970727894 is about 44392.8811184857. The cubic root of 1970727894 is about 1253.7440584776.

The spelling of 1970727894 in words is "one billion, nine hundred seventy million, seven hundred twenty-seven thousand, eight hundred ninety-four".