81028102 has 16 divisors (see below), whose sum is σ = 124137072. Its totient is φ = 39657600.

The previous prime is 81028091. The next prime is 81028127. The reversal of 81028102 is 20182018.

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, 17977 + ... + 22027.

It is an arithmetic number, because the mean of its divisors is an integer number (7758567).

Almost surely, 2^81028102 is an apocalyptic number.

81028102 is a deficient number, since it is larger than the sum of its proper divisors (43108970).

81028102 is a wasteful number, since it uses less digits than its factorization.

81028102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 81028102 is about 9001.5610868338. The cubic root of 81028102 is about 432.7249024641.

The spelling of 81028102 in words is "eighty-one million, twenty-eight thousand, one hundred two".