83778040 has 32 divisors (see below), whose sum is σ = 199590480. Its totient is φ = 31539712.

The previous prime is 83778007. The next prime is 83778041. The reversal of 83778040 is 4087738.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83778041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60922 + ... + 62281.

Almost surely, 2^83778040 is an apocalyptic number.

It is an amenable number.

83778040 is an abundant number, since it is smaller than the sum of its proper divisors (115812440).

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

83778040 is a wasteful number, since it uses less digits than its factorization.

83778040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123231 (or 123227 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 83778040 is about 9153.0344695079. The cubic root of 83778040 is about 437.5658284620.

The spelling of 83778040 in words is "eighty-three million, seven hundred seventy-eight thousand, forty".