81474430 has 8 divisors (see below), whose sum is σ = 146653992. Its totient is φ = 32589768.

The previous prime is 81474391. The next prime is 81474461. The reversal of 81474430 is 3447418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 81474392 and 81474401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4073712 + ... + 4073731.

It is an arithmetic number, because the mean of its divisors is an integer number (18331749).

Almost surely, 2^81474430 is an apocalyptic number.

81474430 is a deficient number, since it is larger than the sum of its proper divisors (65179562).

81474430 is a wasteful number, since it uses less digits than its factorization.

81474430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8147450.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 81474430 is about 9026.3187402174. The cubic root of 81474430 is about 433.5179758823.

The spelling of 81474430 in words is "eighty-one million, four hundred seventy-four thousand, four hundred thirty".