400673738 has 4 divisors (see below), whose sum is σ = 601010610. Its totient is φ = 200336868.

The previous prime is 400673737. The next prime is 400673747. The reversal of 400673738 is 837376004.

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., 248472169 + 152201569 = 15763^2 + 12337^2 .

It is not an unprimeable number, because it can be changed into a prime (400673737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100168433 + ... + 100168436.

Almost surely, 2^400673738 is an apocalyptic number.

400673738 is a deficient number, since it is larger than the sum of its proper divisors (200336872).

400673738 is a wasteful number, since it uses less digits than its factorization.

400673738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200336871.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 400673738 is about 20016.8363634217. The cubic root of 400673738 is about 737.2197463549.

The spelling of 400673738 in words is "four hundred million, six hundred seventy-three thousand, seven hundred thirty-eight".