70719840 has 144 divisors (see below), whose sum is σ = 245267568. Its totient is φ = 18551808.

The previous prime is 70719833. The next prime is 70719853. The reversal of 70719840 is 4891707.

It is a tau number, because it is divible by the number of its divisors (144).

It is a hoax number, since the sum of its digits (36) 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 70719795 and 70719804.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 96114 + ... + 96846.

It is an arithmetic number, because the mean of its divisors is an integer number (1703247).

Almost surely, 2^70719840 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 70719840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122633784).

70719840 is an abundant number, since it is smaller than the sum of its proper divisors (174547728).

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

70719840 is a wasteful number, since it uses less digits than its factorization.

70719840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 70719840 is about 8409.5089036162. The cubic root of 70719840 is about 413.5364130978.

The spelling of 70719840 in words is "seventy million, seven hundred nineteen thousand, eight hundred forty".