40280140 has 24 divisors (see below), whose sum is σ = 89564832. Its totient is φ = 15164160.

The previous prime is 40280131. The next prime is 40280143. The reversal of 40280140 is 4108204.

It is not an unprimeable number, because it can be changed into a prime (40280143) 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, 58896 + ... + 59575.

It is an arithmetic number, because the mean of its divisors is an integer number (3731868).

Almost surely, 2^40280140 is an apocalyptic number.

It is an amenable number.

40280140 is an abundant number, since it is smaller than the sum of its proper divisors (49284692).

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

40280140 is a wasteful number, since it uses less digits than its factorization.

40280140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118497 (or 118495 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 40280140 is about 6346.6636904755. The cubic root of 40280140 is about 342.7917204868.

Adding to 40280140 its reverse (4108204), we get a palindrome (44388344).

The spelling of 40280140 in words is "forty million, two hundred eighty thousand, one hundred forty".