81368030 has 32 divisors (see below), whose sum is σ = 148832640. Its totient is φ = 32025760.

The previous prime is 81368009. The next prime is 81368033. The reversal of 81368030 is 3086318.

It is a junction number, because it is equal to n+sod(n) for n = 81367984 and 81368002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81368033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234317 + ... + 234663.

It is an arithmetic number, because the mean of its divisors is an integer number (4651020).

Almost surely, 2^81368030 is an apocalyptic number.

81368030 is a deficient number, since it is larger than the sum of its proper divisors (67464610).

81368030 is a wasteful number, since it uses less digits than its factorization.

81368030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 81368030 is about 9020.4229390866. The cubic root of 81368030 is about 433.3291787899.

The spelling of 81368030 in words is "eighty-one million, three hundred sixty-eight thousand, thirty".