70865280 has 160 divisors (see below), whose sum is σ = 253257840. Its totient is φ = 18883584.

The previous prime is 70865243. The next prime is 70865303. The reversal of 70865280 is 8256807.

It is a tau number, because it is divible by the number of its divisors (160).

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

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51157 + ... + 52523.

Almost surely, 2^70865280 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 70865280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126628920).

70865280 is an abundant number, since it is smaller than the sum of its proper divisors (182392560).

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

70865280 is a wasteful number, since it uses less digits than its factorization.

70865280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 70865280 is about 8418.1518161649. The cubic root of 70865280 is about 413.8197072551.

The spelling of 70865280 in words is "seventy million, eight hundred sixty-five thousand, two hundred eighty".