70228643 has 4 divisors (see below), whose sum is σ = 70267488. Its totient is φ = 70189800.

The previous prime is 70228619. The next prime is 70228661. The reversal of 70228643 is 34682207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34682207 = 7 ⋅4954601.

It is a cyclic number.

It is not a de Polignac number, because 70228643 - 2¹⁸ = 69966499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70228673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16571 + ... + 20372.

It is an arithmetic number, because the mean of its divisors is an integer number (17566872).

Almost surely, 2^70228643 is an apocalyptic number.

70228643 is a deficient number, since it is larger than the sum of its proper divisors (38845).

70228643 is a wasteful number, since it uses less digits than its factorization.

70228643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38844.

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

The square root of 70228643 is about 8380.2531584672. The cubic root of 70228643 is about 412.5767580453.

The spelling of 70228643 in words is "seventy million, two hundred twenty-eight thousand, six hundred forty-three".