40609402 has 4 divisors (see below), whose sum is σ = 60914106. Its totient is φ = 20304700.

The previous prime is 40609399. The next prime is 40609423. The reversal of 40609402 is 20490604.

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., 29909961 + 10699441 = 5469^2 + 3271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10152349 + ... + 10152352.

Almost surely, 2^40609402 is an apocalyptic number.

40609402 is a deficient number, since it is larger than the sum of its proper divisors (20304704).

40609402 is a wasteful number, since it uses less digits than its factorization.

40609402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20304703.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40609402 is about 6372.5506667268. The cubic root of 40609402 is about 343.7232145741.

The spelling of 40609402 in words is "forty million, six hundred nine thousand, four hundred two".