70273728 has 168 divisors, whose sum is σ = 238536480. Its totient is φ = 19353600.

The previous prime is 70273703. The next prime is 70273747. The reversal of 70273728 is 82737207.

It is a tau number, because it is divible by the number of its divisors (168).

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 = 70273692 and 70273701.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116628 + ... + 117228.

It is an arithmetic number, because the mean of its divisors is an integer number (1419860).

Almost surely, 2^70273728 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 70273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119268240).

70273728 is an abundant number, since it is smaller than the sum of its proper divisors (168262752).

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

70273728 is a wasteful number, since it uses less digits than its factorization.

70273728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 70273728 is about 8382.9426814216. The cubic root of 70273728 is about 412.6650270825.

The spelling of 70273728 in words is "seventy million, two hundred seventy-three thousand, seven hundred twenty-eight".