83520440 has 16 divisors (see below), whose sum is σ = 187921080. Its totient is φ = 33408160.

The previous prime is 83520419. The next prime is 83520443. The reversal of 83520440 is 4402538.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83520443) 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, 1043966 + ... + 1044045.

Almost surely, 2^83520440 is an apocalyptic number.

It is an amenable number.

83520440 is an abundant number, since it is smaller than the sum of its proper divisors (104400640).

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

83520440 is a wasteful number, since it uses less digits than its factorization.

83520440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088022 (or 2088018 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 83520440 is about 9138.9517998510. The cubic root of 83520440 is about 437.1168934658.

Adding to 83520440 its reverse (4402538), we get a palindrome (87922978).

The spelling of 83520440 in words is "eighty-three million, five hundred twenty thousand, four hundred forty".