1969978080 has 192 divisors, whose sum is σ = 7321079808. Its totient is φ = 435732480.

The previous prime is 1969978063. The next prime is 1969978123. The reversal of 1969978080 is 808799691.

It is a self number, because there is not a number n which added to its sum of digits gives 1969978080.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94704 + ... + 113616.

It is an arithmetic number, because the mean of its divisors is an integer number (38130624).

Almost surely, 2^1969978080 is an apocalyptic number.

1969978080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1969978080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3660539904).

1969978080 is an abundant number, since it is smaller than the sum of its proper divisors (5351101728).

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

1969978080 is a wasteful number, since it uses less digits than its factorization.

1969978080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18969 (or 18961 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 1969978080 is about 44384.4351096192. The cubic root of 1969978080 is about 1253.5850319405.

It can be divided in two parts, 19699 and 78080, that added together give a palindrome (97779).

The spelling of 1969978080 in words is "one billion, nine hundred sixty-nine million, nine hundred seventy-eight thousand, eighty".