397780594 has 4 divisors (see below), whose sum is σ = 596670894. Its totient is φ = 198890296.

The previous prime is 397780549. The next prime is 397780597. The reversal of 397780594 is 495087793.

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., 340218025 + 57562569 = 18445^2 + 7587^2 .

It is not an unprimeable number, because it can be changed into a prime (397780597) 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, 99445147 + ... + 99445150.

Almost surely, 2^397780594 is an apocalyptic number.

397780594 is a deficient number, since it is larger than the sum of its proper divisors (198890300).

397780594 is a wasteful number, since it uses less digits than its factorization.

397780594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198890299.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 397780594 is about 19944.4376706890. The cubic root of 397780594 is about 735.4410446245.

The spelling of 397780594 in words is "three hundred ninety-seven million, seven hundred eighty thousand, five hundred ninety-four".