81950832 has 40 divisors (see below), whose sum is σ = 235230480. Its totient is φ = 27316800.

The previous prime is 81950831. The next prime is 81950833. The reversal of 81950832 is 23805918.

It is an interprime number because it is at equal distance from previous prime (81950831) and next prime (81950833).

It is a super-3 number, since 3×81950832³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81950831) 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, 94419 + ... + 95282.

It is an arithmetic number, because the mean of its divisors is an integer number (5880762).

Almost surely, 2^81950832 is an apocalyptic number.

It is an amenable number.

81950832 is an abundant number, since it is smaller than the sum of its proper divisors (153279648).

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

81950832 is a wasteful number, since it uses less digits than its factorization.

81950832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189718 (or 189706 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 81950832 is about 9052.6698824159. The cubic root of 81950832 is about 434.3612980996.

The spelling of 81950832 in words is "eighty-one million, nine hundred fifty thousand, eight hundred thirty-two".