40381430 has 16 divisors (see below), whose sum is σ = 74651760. Its totient is φ = 15715872.

The previous prime is 40381423. The next prime is 40381447. The reversal of 40381430 is 3418304.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40381396 and 40381405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54200 + ... + 54939.

It is an arithmetic number, because the mean of its divisors is an integer number (4665735).

Almost surely, 2^40381430 is an apocalyptic number.

40381430 is a deficient number, since it is larger than the sum of its proper divisors (34270330).

40381430 is a wasteful number, since it uses less digits than its factorization.

40381430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109183.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40381430 is about 6354.6384633589. The cubic root of 40381430 is about 343.0788124222.

Adding to 40381430 its reverse (3418304), we get a palindrome (43799734).

The spelling of 40381430 in words is "forty million, three hundred eighty-one thousand, four hundred thirty".