1971484416 has 216 divisors, whose sum is σ = 6267590784. Its totient is φ = 591022080.

The previous prime is 1971484397. The next prime is 1971484423. The reversal of 1971484416 is 6144841791.

1971484416 is a `hidden beast` number, since 1 + 97 + 148 + 4 + 416 = 666.

It is a super-2 number, since 2×1971484416² = 7773501605061722112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2711445 + ... + 2712171.

It is an arithmetic number, because the mean of its divisors is an integer number (29016624).

Almost surely, 2^1971484416 is an apocalyptic number.

1971484416 is a gapful number since it is divisible by the number (16) 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 1971484416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3133795392).

1971484416 is an abundant number, since it is smaller than the sum of its proper divisors (4296106368).

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

1971484416 is a wasteful number, since it uses less digits than its factorization.

1971484416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 850 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1971484416 is about 44401.4010589756. The cubic root of 1971484416 is about 1253.9044668261.

The spelling of 1971484416 in words is "one billion, nine hundred seventy-one million, four hundred eighty-four thousand, four hundred sixteen".