70240728 has 32 divisors (see below), whose sum is σ = 175815360. Its totient is φ = 23385120.

The previous prime is 70240721. The next prime is 70240757. The reversal of 70240728 is 82704207.

It is a junction number, because it is equal to n+sod(n) for n = 70240695 and 70240704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70240721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29851 + ... + 32117.

It is an arithmetic number, because the mean of its divisors is an integer number (5494230).

Almost surely, 2^70240728 is an apocalyptic number.

It is an amenable number.

70240728 is an abundant number, since it is smaller than the sum of its proper divisors (105574632).

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

70240728 is a wasteful number, since it uses less digits than its factorization.

70240728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 70240728 is about 8380.9741677206. The cubic root of 70240728 is about 412.6004221988.

The spelling of 70240728 in words is "seventy million, two hundred forty thousand, seven hundred twenty-eight".