70028531 has 4 divisors (see below), whose sum is σ = 71921232. Its totient is φ = 68135832.

The previous prime is 70028527. The next prime is 70028551. The reversal of 70028531 is 13582007.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70028531 - 2² = 70028527 is a prime.

It is a super-2 number, since 2×70028531² = 9807990308035922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70028531.

It is not an unprimeable number, because it can be changed into a prime (70028521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946295 + ... + 946368.

It is an arithmetic number, because the mean of its divisors is an integer number (17980308).

Almost surely, 2^70028531 is an apocalyptic number.

70028531 is a deficient number, since it is larger than the sum of its proper divisors (1892701).

70028531 is a wasteful number, since it uses less digits than its factorization.

70028531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892700.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 70028531 is about 8368.3051450099. The cubic root of 70028531 is about 412.1845149424.

The spelling of 70028531 in words is "seventy million, twenty-eight thousand, five hundred thirty-one".