82473840 has 60 divisors (see below), whose sum is σ = 276977064. Its totient is φ = 21992832.

The previous prime is 82473829. The next prime is 82473887. The reversal of 82473840 is 4837428.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 82473795 and 82473804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56554 + ... + 57993.

Almost surely, 2^82473840 is an apocalyptic number.

82473840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

82473840 is an abundant number, since it is smaller than the sum of its proper divisors (194503224).

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

82473840 is a wasteful number, since it uses less digits than its factorization.

82473840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114566 (or 114557 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 82473840 is about 9081.5108875121. The cubic root of 82473840 is about 435.2833666976.

The spelling of 82473840 in words is "eighty-two million, four hundred seventy-three thousand, eight hundred forty".