83904840 has 48 divisors (see below), whose sum is σ = 272691900. Its totient is φ = 22374528.

The previous prime is 83904833. The next prime is 83904869. The reversal of 83904840 is 4840938.

It can be written as a sum of positive squares in 2 ways, for example, as 79816356 + 4088484 = 8934^2 + 2022^2 .

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 = 83904795 and 83904804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116175 + ... + 116894.

Almost surely, 2^83904840 is an apocalyptic number.

It is an amenable number.

83904840 is an abundant number, since it is smaller than the sum of its proper divisors (188787060).

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

83904840 is a wasteful number, since it uses less digits than its factorization.

83904840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233086 (or 233079 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 83904840 is about 9159.9585151899. The cubic root of 83904840 is about 437.7864725145.

The spelling of 83904840 in words is "eighty-three million, nine hundred four thousand, eight hundred forty".