424207138 has 4 divisors (see below), whose sum is σ = 636310710. Its totient is φ = 212103568.

The previous prime is 424207123. The next prime is 424207141. The reversal of 424207138 is 831702424.

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., 360734049 + 63473089 = 18993^2 + 7967^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051783 + ... + 106051786.

Almost surely, 2^424207138 is an apocalyptic number.

424207138 is a deficient number, since it is larger than the sum of its proper divisors (212103572).

424207138 is a wasteful number, since it uses less digits than its factorization.

424207138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212103571.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 424207138 is about 20596.2894230975. The cubic root of 424207138 is about 751.3794689022.

The spelling of 424207138 in words is "four hundred twenty-four million, two hundred seven thousand, one hundred thirty-eight".