40120784 has 40 divisors (see below), whose sum is σ = 85226688. Its totient is φ = 18145280.

The previous prime is 40120781. The next prime is 40120813. The reversal of 40120784 is 48702104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44789 + ... + 45675.

Almost surely, 2^40120784 is an apocalyptic number.

40120784 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40120784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42613344).

40120784 is an abundant number, since it is smaller than the sum of its proper divisors (45105904).

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

40120784 is a wasteful number, since it uses less digits than its factorization.

40120784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 40120784 is about 6334.0969364227. The cubic root of 40120784 is about 342.3390729948.

Adding to 40120784 its reverse (48702104), we get a palindrome (88822888).

It can be divided in two parts, 40120 and 784, that added together give a palindrome (40904).

The spelling of 40120784 in words is "forty million, one hundred twenty thousand, seven hundred eighty-four".