70808724 has 108 divisors (see below), whose sum is σ = 210446964. Its totient is φ = 20014848.

The previous prime is 70808719. The next prime is 70808729. The reversal of 70808724 is 42780807.

It is an interprime number because it is at equal distance from previous prime (70808719) and next prime (70808729).

It can be written as a sum of positive squares in 2 ways, for example, as 56520324 + 14288400 = 7518^2 + 3780^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70808729) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 241522 + ... + 241814.

It is an arithmetic number, because the mean of its divisors is an integer number (1948583).

Almost surely, 2^70808724 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 70808724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105223482).

70808724 is an abundant number, since it is smaller than the sum of its proper divisors (139638240).

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

70808724 is a wasteful number, since it uses less digits than its factorization.

70808724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 70808724 is about 8414.7919760384. The cubic root of 70808724 is about 413.7095911954.

The spelling of 70808724 in words is "seventy million, eight hundred eight thousand, seven hundred twenty-four".