70979280 has 80 divisors (see below), whose sum is σ = 222575040. Its totient is φ = 18709504.

The previous prime is 70979273. The next prime is 70979299. The reversal of 70979280 is 8297907.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19699 + ... + 23021.

It is an arithmetic number, because the mean of its divisors is an integer number (2782188).

Almost surely, 2^70979280 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 70979280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111287520).

70979280 is an abundant number, since it is smaller than the sum of its proper divisors (151595760).

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

70979280 is a wasteful number, since it uses less digits than its factorization.

70979280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 70979280 is about 8424.9201776634. The cubic root of 70979280 is about 414.0414903924.

The spelling of 70979280 in words is "seventy million, nine hundred seventy-nine thousand, two hundred eighty".