83400440 has 16 divisors (see below), whose sum is σ = 187651080. Its totient is φ = 33360160.

The previous prime is 83400431. The next prime is 83400451. The reversal of 83400440 is 4400438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1042466 + ... + 1042545.

Almost surely, 2^83400440 is an apocalyptic number.

It is an amenable number.

83400440 is an abundant number, since it is smaller than the sum of its proper divisors (104250640).

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

83400440 is a wasteful number, since it uses less digits than its factorization.

83400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085022 (or 2085018 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 83400440 is about 9132.3841355913. The cubic root of 83400440 is about 436.9074470563.

Adding to 83400440 its reverse (4400438), we get a palindrome (87800878).

The spelling of 83400440 in words is "eighty-three million, four hundred thousand, four hundred forty".