406925138 has 4 divisors (see below), whose sum is σ = 610387710. Its totient is φ = 203462568.

The previous prime is 406925117. The next prime is 406925153. The reversal of 406925138 is 831529604.

It is a happy number.

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., 346816129 + 60109009 = 18623^2 + 7753^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101731283 + ... + 101731286.

Almost surely, 2^406925138 is an apocalyptic number.

406925138 is a deficient number, since it is larger than the sum of its proper divisors (203462572).

406925138 is a wasteful number, since it uses less digits than its factorization.

406925138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203462571.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 406925138 is about 20172.3855307200. The cubic root of 406925138 is about 741.0340656602.

The spelling of 406925138 in words is "four hundred six million, nine hundred twenty-five thousand, one hundred thirty-eight".