70213728 has 96 divisors (see below), whose sum is σ = 200503296. Its totient is φ = 21385728.

The previous prime is 70213691. The next prime is 70213739. The reversal of 70213728 is 82731207.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 70213695 and 70213704.

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, 158275 + ... + 158717.

It is an arithmetic number, because the mean of its divisors is an integer number (2088576).

Almost surely, 2^70213728 is an apocalyptic number.

70213728 is a gapful number since it is divisible by the number (78) 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 70213728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100251648).

70213728 is an abundant number, since it is smaller than the sum of its proper divisors (130289568).

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

70213728 is a wasteful number, since it uses less digits than its factorization.

70213728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 70213728 is about 8379.3632216297. The cubic root of 70213728 is about 412.5475486052.

The spelling of 70213728 in words is "seventy million, two hundred thirteen thousand, seven hundred twenty-eight".