70221760 has 224 divisors, whose sum is σ = 210677760. Its totient is φ = 21762048.

The previous prime is 70221743. The next prime is 70221779. The reversal of 70221760 is 6712207.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1494057 + ... + 1494103.

Almost surely, 2^70221760 is an apocalyptic number.

70221760 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70221760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105338880).

70221760 is an abundant number, since it is smaller than the sum of its proper divisors (140456000).

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

70221760 is a wasteful number, since it uses less digits than its factorization.

70221760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 70221760 is about 8379.8424806198. The cubic root of 70221760 is about 412.5632789363.

Adding to 70221760 its reverse (6712207), we get a palindrome (76933967).

The spelling of 70221760 in words is "seventy million, two hundred twenty-one thousand, seven hundred sixty".