83481040 has 20 divisors (see below), whose sum is σ = 194093604. Its totient is φ = 33392384.

The previous prime is 83481031. The next prime is 83481049. The reversal of 83481040 is 4018438.

It is an interprime number because it is at equal distance from previous prime (83481031) and next prime (83481049).

It can be written as a sum of positive squares in 2 ways, for example, as 32672656 + 50808384 = 5716^2 + 7128^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83481049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521677 + ... + 521836.

Almost surely, 2^83481040 is an apocalyptic number.

83481040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

83481040 is an abundant number, since it is smaller than the sum of its proper divisors (110612564).

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

83481040 is a wasteful number, since it uses less digits than its factorization.

83481040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043526 (or 1043520 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 83481040 is about 9136.7959373076. The cubic root of 83481040 is about 437.0481473621.

Adding to 83481040 its reverse (4018438), we get a palindrome (87499478).

The spelling of 83481040 in words is "eighty-three million, four hundred eighty-one thousand, forty".