83881440 has 96 divisors (see below), whose sum is σ = 293600160. Its totient is φ = 22367232.

The previous prime is 83881423. The next prime is 83881481. The reversal of 83881440 is 4418838.

It is a tau number, because it is divible by the number of its divisors (96).

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 = 83881395 and 83881404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5389 + ... + 14028.

It is an arithmetic number, because the mean of its divisors is an integer number (3058335).

Almost surely, 2^83881440 is an apocalyptic number.

83881440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83881440 is an abundant number, since it is smaller than the sum of its proper divisors (209718720).

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

83881440 is a wasteful number, since it uses less digits than its factorization.

83881440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19441 (or 19427 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 83881440 is about 9158.6811277607. The cubic root of 83881440 is about 437.7457710249.

The spelling of 83881440 in words is "eighty-three million, eight hundred eighty-one thousand, four hundred forty".