40381434 has 24 divisors (see below), whose sum is σ = 87702420. Its totient is φ = 13428288.

The previous prime is 40381423. The next prime is 40381447. The reversal of 40381434 is 43418304.

It can be written as a sum of positive squares in 2 ways, for example, as 29192409 + 11189025 = 5403^2 + 3345^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40381398 and 40381407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5772 + ... + 10680.

Almost surely, 2^40381434 is an apocalyptic number.

40381434 is an abundant number, since it is smaller than the sum of its proper divisors (47320986).

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

40381434 is a wasteful number, since it uses less digits than its factorization.

40381434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374 (or 5371 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 40381434 is about 6354.6387780896. The cubic root of 40381434 is about 343.0788237502.

Adding to 40381434 its reverse (43418304), we get a palindrome (83799738).

The spelling of 40381434 in words is "forty million, three hundred eighty-one thousand, four hundred thirty-four".