81488958 has 8 divisors (see below), whose sum is σ = 162977928. Its totient is φ = 27162984.

The previous prime is 81488947. The next prime is 81488969. The reversal of 81488958 is 85988418.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81488947) and next prime (81488969).

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

81488958 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81488958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6790741 + ... + 6790752.

It is an arithmetic number, because the mean of its divisors is an integer number (20372241).

Almost surely, 2^81488958 is an apocalyptic number.

81488958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81488958 is a wasteful number, since it uses less digits than its factorization.

81488958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13581498.

The product of its digits is 737280, while the sum is 51.

The square root of 81488958 is about 9027.1234621002. The cubic root of 81488958 is about 433.5437417365.

The spelling of 81488958 in words is "eighty-one million, four hundred eighty-eight thousand, nine hundred fifty-eight".