39402218 has 8 divisors (see below), whose sum is σ = 60072420. Its totient is φ = 19378080.

The previous prime is 39402217. The next prime is 39402229. The reversal of 39402218 is 81220493.

It can be written as a sum of positive squares in 2 ways, for example, as 30658369 + 8743849 = 5537^2 + 2957^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39402217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161363 + ... + 161606.

Almost surely, 2^39402218 is an apocalyptic number.

39402218 is a deficient number, since it is larger than the sum of its proper divisors (20670202).

39402218 is a wasteful number, since it uses less digits than its factorization.

39402218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323032.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 39402218 is about 6277.1186064945. The cubic root of 39402218 is about 340.2829766437.

The spelling of 39402218 in words is "thirty-nine million, four hundred two thousand, two hundred eighteen".