83487840 has 48 divisors (see below), whose sum is σ = 262988208. Its totient is φ = 22263296.

The previous prime is 83487827. The next prime is 83487841. The reversal of 83487840 is 4878438.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 83487792 and 83487801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83487841) 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, 86487 + ... + 87446.

It is an arithmetic number, because the mean of its divisors is an integer number (5478921).

Almost surely, 2^83487840 is an apocalyptic number.

83487840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83487840 is an abundant number, since it is smaller than the sum of its proper divisors (179500368).

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

83487840 is a wasteful number, since it uses less digits than its factorization.

83487840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173951 (or 173943 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 83487840 is about 9137.1680514260. The cubic root of 83487840 is about 437.0600137161.

The spelling of 83487840 in words is "eighty-three million, four hundred eighty-seven thousand, eight hundred forty".