126978984 has 96 divisors (see below), whose sum is σ = 397275840. Its totient is φ = 36211200.

The previous prime is 126978979. The next prime is 126978989. The reversal of 126978984 is 489879621.

It is an interprime number because it is at equal distance from previous prime (126978979) and next prime (126978989).

It is a super-2 number, since 2×126978984² = 32247324755344512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126978984.

It is not an unprimeable number, because it can be changed into a prime (126978989) 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 23 ways as a sum of consecutive naturals, for example, 8749 + ... + 18179.

It is an arithmetic number, because the mean of its divisors is an integer number (4138290).

Almost surely, 2^126978984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126978984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198637920).

126978984 is an abundant number, since it is smaller than the sum of its proper divisors (270296856).

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

126978984 is a wasteful number, since it uses less digits than its factorization.

126978984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9471 (or 9464 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 126978984 is about 11268.4951967865. The cubic root of 126978984 is about 502.6248416333.

The spelling of 126978984 in words is "one hundred twenty-six million, nine hundred seventy-eight thousand, nine hundred eighty-four".