400073858 has 4 divisors (see below), whose sum is σ = 600110790. Its totient is φ = 200036928.

The previous prime is 400073857. The next prime is 400073873. The reversal of 400073858 is 858370004.

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., 392713489 + 7360369 = 19817^2 + 2713^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400073857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100018463 + ... + 100018466.

Almost surely, 2^400073858 is an apocalyptic number.

400073858 is a deficient number, since it is larger than the sum of its proper divisors (200036932).

400073858 is a wasteful number, since it uses less digits than its factorization.

400073858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200036931.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 400073858 is about 20001.8463647734. The cubic root of 400073858 is about 736.8516461369.

The spelling of 400073858 in words is "four hundred million, seventy-three thousand, eight hundred fifty-eight".