70781152 has 48 divisors (see below), whose sum is σ = 150927840. Its totient is φ = 32481792.

The previous prime is 70781119. The next prime is 70781171. The reversal of 70781152 is 25118707.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94893 + ... + 95635.

It is an arithmetic number, because the mean of its divisors is an integer number (3144330).

Almost surely, 2^70781152 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 70781152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75463920).

70781152 is an abundant number, since it is smaller than the sum of its proper divisors (80146688).

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

70781152 is a wasteful number, since it uses less digits than its factorization.

70781152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 70781152 is about 8413.1535110207. The cubic root of 70781152 is about 413.6558865054.

Adding to 70781152 its reverse (25118707), we get a palindrome (95899859).

The spelling of 70781152 in words is "seventy million, seven hundred eighty-one thousand, one hundred fifty-two".