397651442 has 8 divisors (see below), whose sum is σ = 598396032. Its totient is φ = 198186100.

The previous prime is 397651433. The next prime is 397651481. The reversal of 397651442 is 244156793.

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

It is a self number, because there is not a number n which added to its sum of digits gives 397651442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319034 + ... + 320277.

It is an arithmetic number, because the mean of its divisors is an integer number (74799504).

Almost surely, 2^397651442 is an apocalyptic number.

397651442 is a deficient number, since it is larger than the sum of its proper divisors (200744590).

397651442 is a wasteful number, since it uses less digits than its factorization.

397651442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639624.

The product of its digits is 181440, while the sum is 41.

The square root of 397651442 is about 19941.1996128618. The cubic root of 397651442 is about 735.3614413081.

The spelling of 397651442 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, four hundred forty-two".