70521984 has 192 divisors, whose sum is σ = 232235640. Its totient is φ = 20348928.

The previous prime is 70521947. The next prime is 70522003. The reversal of 70521984 is 48912507.

It can be written as a sum of positive squares in 4 ways, for example, as 46785600 + 23736384 = 6840^2 + 4872^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254454 + ... + 254730.

Almost surely, 2^70521984 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 70521984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116117820).

70521984 is an abundant number, since it is smaller than the sum of its proper divisors (161713656).

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

70521984 is a wasteful number, since it uses less digits than its factorization.

70521984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 70521984 is about 8397.7368379820. The cubic root of 70521984 is about 413.1503965580.

The spelling of 70521984 in words is "seventy million, five hundred twenty-one thousand, nine hundred eighty-four".