40031402 has 4 divisors (see below), whose sum is σ = 60047106. Its totient is φ = 20015700.

The previous prime is 40031401. The next prime is 40031419. The reversal of 40031402 is 20413004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36348841 + 3682561 = 6029^2 + 1919^2 .

It is not an unprimeable number, because it can be changed into a prime (40031401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007849 + ... + 10007852.

Almost surely, 2^40031402 is an apocalyptic number.

40031402 is a deficient number, since it is larger than the sum of its proper divisors (20015704).

40031402 is a wasteful number, since it uses less digits than its factorization.

40031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20015703.

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

The square root of 40031402 is about 6327.0373793743. The cubic root of 40031402 is about 342.0846603675.

Adding to 40031402 its reverse (20413004), we get a palindrome (60444406).

The spelling of 40031402 in words is "forty million, thirty-one thousand, four hundred two".