72281658 has 16 divisors (see below), whose sum is σ = 145322496. Its totient is φ = 23967360.

The previous prime is 72281653. The next prime is 72281689. The reversal of 72281658 is 85618227.

It is not an unprimeable number, because it can be changed into a prime (72281653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30391 + ... + 32682.

It is an arithmetic number, because the mean of its divisors is an integer number (9082656).

Almost surely, 2^72281658 is an apocalyptic number.

72281658 is an abundant number, since it is smaller than the sum of its proper divisors (73040838).

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

72281658 is a wasteful number, since it uses less digits than its factorization.

72281658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63269.

The product of its digits is 53760, while the sum is 39.

The square root of 72281658 is about 8501.8620313435. The cubic root of 72281658 is about 416.5585330773.

The spelling of 72281658 in words is "seventy-two million, two hundred eighty-one thousand, six hundred fifty-eight".