81028030 has 16 divisors (see below), whose sum is σ = 150880320. Its totient is φ = 31293472.

The previous prime is 81028021. The next prime is 81028037. The reversal of 81028030 is 3082018.

It is a junction number, because it is equal to n+sod(n) for n = 81027992 and 81028010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81028037) 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, 139414 + ... + 139993.

It is an arithmetic number, because the mean of its divisors is an integer number (9430020).

Almost surely, 2^81028030 is an apocalyptic number.

81028030 is a deficient number, since it is larger than the sum of its proper divisors (69852290).

81028030 is a wasteful number, since it uses less digits than its factorization.

81028030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279443.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 81028030 is about 9001.5570875266. The cubic root of 81028030 is about 432.7247742937.

The spelling of 81028030 in words is "eighty-one million, twenty-eight thousand, thirty".