40281830 has 16 divisors (see below), whose sum is σ = 73227024. Its totient is φ = 15952800.

The previous prime is 40281821. The next prime is 40281833. The reversal of 40281830 is 3818204.

It is a self number, because there is not a number n which added to its sum of digits gives 40281830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40281833) 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, 18932 + ... + 20951.

It is an arithmetic number, because the mean of its divisors is an integer number (4576689).

Almost surely, 2^40281830 is an apocalyptic number.

40281830 is a deficient number, since it is larger than the sum of its proper divisors (32945194).

40281830 is a wasteful number, since it uses less digits than its factorization.

40281830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39991.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 40281830 is about 6346.7968298977. The cubic root of 40281830 is about 342.7965144945.

The spelling of 40281830 in words is "forty million, two hundred eighty-one thousand, eight hundred thirty".