40283784 has 128 divisors (see below), whose sum is σ = 118800000. Its totient is φ = 12628224.

The previous prime is 40283783. The next prime is 40283791. The reversal of 40283784 is 48738204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40283783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369522 + ... + 369630.

It is an arithmetic number, because the mean of its divisors is an integer number (928125).

Almost surely, 2^40283784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40283784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59400000).

40283784 is an abundant number, since it is smaller than the sum of its proper divisors (78516216).

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

40283784 is a wasteful number, since it uses less digits than its factorization.

40283784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 40283784 is about 6346.9507639496. The cubic root of 40283784 is about 342.8020572215.

The spelling of 40283784 in words is "forty million, two hundred eighty-three thousand, seven hundred eighty-four".