70643228 has 24 divisors (see below), whose sum is σ = 131870592. Its totient is φ = 32996864.

The previous prime is 70643213. The next prime is 70643231. The reversal of 70643228 is 82234607.

It is a junction number, because it is equal to n+sod(n) for n = 70643194 and 70643203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5525 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (5494608).

Almost surely, 2^70643228 is an apocalyptic number.

It is an amenable number.

70643228 is a deficient number, since it is larger than the sum of its proper divisors (61227364).

70643228 is a wasteful number, since it uses less digits than its factorization.

70643228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7741 (or 7739 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 70643228 is about 8404.9525876117. The cubic root of 70643228 is about 413.3870288087.

It can be divided in two parts, 706 and 43228, that added together give a palindrome (43934).

The spelling of 70643228 in words is "seventy million, six hundred forty-three thousand, two hundred twenty-eight".