40203140 has 24 divisors (see below), whose sum is σ = 85178520. Its totient is φ = 15938048.

The previous prime is 40203139. The next prime is 40203143. The reversal of 40203140 is 4130204.

It can be written as a sum of positive squares in 4 ways, for example, as 3818116 + 36385024 = 1954^2 + 6032^2 .

It is not an unprimeable number, because it can be changed into a prime (40203143) 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, 6635 + ... + 11154.

It is an arithmetic number, because the mean of its divisors is an integer number (3549105).

Almost surely, 2^40203140 is an apocalyptic number.

It is an amenable number.

40203140 is an abundant number, since it is smaller than the sum of its proper divisors (44975380).

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

40203140 is a wasteful number, since it uses less digits than its factorization.

40203140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17911 (or 17909 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40203140 is about 6340.5946093407. The cubic root of 40203140 is about 342.5731528971.

Adding to 40203140 its reverse (4130204), we get a palindrome (44333344).

It can be divided in two parts, 4020 and 3140, that multiplied together give a triangular number (12622800 = T₅₀₂₄).

The spelling of 40203140 in words is "forty million, two hundred three thousand, one hundred forty".