427721438 has 8 divisors (see below), whose sum is σ = 641762688. Its totient is φ = 213800544.

The previous prime is 427721431. The next prime is 427721461. The reversal of 427721438 is 834127724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427721431) 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 in 3 ways as a sum of consecutive naturals, for example, 20606 + ... + 35777.

It is an arithmetic number, because the mean of its divisors is an integer number (80220336).

Almost surely, 2^427721438 is an apocalyptic number.

427721438 is a deficient number, since it is larger than the sum of its proper divisors (214041250).

427721438 is a wasteful number, since it uses less digits than its factorization.

427721438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60178.

The product of its digits is 75264, while the sum is 38.

The square root of 427721438 is about 20681.4273685353. The cubic root of 427721438 is about 753.4486737451.

The spelling of 427721438 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, four hundred thirty-eight".