40784140 has 24 divisors (see below), whose sum is σ = 85906800. Its totient is φ = 16264128.

The previous prime is 40784123. The next prime is 40784141. The reversal of 40784140 is 4148704.

It is a junction number, because it is equal to n+sod(n) for n = 40784099 and 40784108.

It is not an unprimeable number, because it can be changed into a prime (40784141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4059 + ... + 9901.

It is an arithmetic number, because the mean of its divisors is an integer number (3579450).

Almost surely, 2^40784140 is an apocalyptic number.

It is an amenable number.

40784140 is an abundant number, since it is smaller than the sum of its proper divisors (45122660).

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

40784140 is a wasteful number, since it uses less digits than its factorization.

40784140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201 (or 6199 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 40784140 is about 6386.2461587383. The cubic root of 40784140 is about 344.2155108021.

The spelling of 40784140 in words is "forty million, seven hundred eighty-four thousand, one hundred forty".