70731144 has 80 divisors (see below), whose sum is σ = 216144720. Its totient is φ = 21431520.

The previous prime is 70731137. The next prime is 70731179. The reversal of 70731144 is 44113707.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2167 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (2701809).

Almost surely, 2^70731144 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 70731144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108072360).

70731144 is an abundant number, since it is smaller than the sum of its proper divisors (145413576).

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

70731144 is a wasteful number, since it uses less digits than its factorization.

70731144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9952 (or 9939 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 70731144 is about 8410.1809730826. The cubic root of 70731144 is about 413.5584454184.

The spelling of 70731144 in words is "seventy million, seven hundred thirty-one thousand, one hundred forty-four".