81652060 has 24 divisors (see below), whose sum is σ = 195965280. Its totient is φ = 27994944.

The previous prime is 81652049. The next prime is 81652091. The reversal of 81652060 is 6025618.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291475 + ... + 291754.

It is an arithmetic number, because the mean of its divisors is an integer number (8165220).

Almost surely, 2^81652060 is an apocalyptic number.

It is an amenable number.

81652060 is an abundant number, since it is smaller than the sum of its proper divisors (114313220).

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

81652060 is a wasteful number, since it uses less digits than its factorization.

81652060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583245 (or 583243 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 81652060 is about 9036.1529424861. The cubic root of 81652060 is about 433.8327981860.

Adding to 81652060 its reverse (6025618), we get a palindrome (87677678).

The spelling of 81652060 in words is "eighty-one million, six hundred fifty-two thousand, sixty".