81048358 has 4 divisors (see below), whose sum is σ = 121572540. Its totient is φ = 40524178.

The previous prime is 81048313. The next prime is 81048437. The reversal of 81048358 is 85384018.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20262088 + ... + 20262091.

It is an arithmetic number, because the mean of its divisors is an integer number (30393135).

Almost surely, 2^81048358 is an apocalyptic number.

81048358 is a deficient number, since it is larger than the sum of its proper divisors (40524182).

81048358 is a wasteful number, since it uses less digits than its factorization.

81048358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40524181.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 81048358 is about 9002.6861546985. The cubic root of 81048358 is about 432.7609580427.

It can be divided in two parts, 81048 and 358, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 81048358 in words is "eighty-one million, forty-eight thousand, three hundred fifty-eight".