70915840 has 72 divisors (see below), whose sum is σ = 179912880. Its totient is φ = 26689536.

The previous prime is 70915829. The next prime is 70915849. The reversal of 70915840 is 4851907.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 70915796 and 70915805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70915849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20131 + ... + 23389.

It is an arithmetic number, because the mean of its divisors is an integer number (2498790).

Almost surely, 2^70915840 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 70915840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89956440).

70915840 is an abundant number, since it is smaller than the sum of its proper divisors (108997040).

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

70915840 is a wasteful number, since it uses less digits than its factorization.

70915840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 70915840 is about 8421.1543151756. The cubic root of 70915840 is about 413.9180993519.

The spelling of 70915840 in words is "seventy million, nine hundred fifteen thousand, eight hundred forty".