83944840 has 48 divisors (see below), whose sum is σ = 219717900. Its totient is φ = 28780416.

The previous prime is 83944829. The next prime is 83944843. The reversal of 83944840 is 4844938.

83944840 = T₃₂₃ + T₃₂₄ + ... + T₈₁₂.

It can be written as a sum of positive squares in 2 ways, for example, as 83064996 + 879844 = 9114^2 + 938^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 83944793 and 83944802.

It is not an unprimeable number, because it can be changed into a prime (83944843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19455 + ... + 23374.

Almost surely, 2^83944840 is an apocalyptic number.

It is an amenable number.

83944840 is an abundant number, since it is smaller than the sum of its proper divisors (135773060).

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

83944840 is a wasteful number, since it uses less digits than its factorization.

83944840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42854 (or 42843 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 83944840 is about 9162.1416710287. The cubic root of 83944840 is about 437.8560301900.

The spelling of 83944840 in words is "eighty-three million, nine hundred forty-four thousand, eight hundred forty".