42400738 has 4 divisors (see below), whose sum is σ = 63601110. Its totient is φ = 21200368.

The previous prime is 42400733. The next prime is 42400741. The reversal of 42400738 is 83700424.

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., 30724849 + 11675889 = 5543^2 + 3417^2 .

42400738 is a modest number, since divided by 738 gives 424 as remainder.

It is not an unprimeable number, because it can be changed into a prime (42400733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600183 + ... + 10600186.

Almost surely, 2^42400738 is an apocalyptic number.

42400738 is a deficient number, since it is larger than the sum of its proper divisors (21200372).

42400738 is a wasteful number, since it uses less digits than its factorization.

42400738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21200371.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 42400738 is about 6511.5849069178. The cubic root of 42400738 is about 348.7047033748.

The spelling of 42400738 in words is "forty-two million, four hundred thousand, seven hundred thirty-eight".