385997770 has 8 divisors (see below), whose sum is σ = 694796004. Its totient is φ = 154399104.

The previous prime is 385997747. The next prime is 385997779. The reversal of 385997770 is 77799583.

It can be written as a sum of positive squares in 2 ways, for example, as 382945761 + 3052009 = 19569^2 + 1747^2 .

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

It is not an unprimeable number, because it can be changed into a prime (385997779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19299879 + ... + 19299898.

Almost surely, 2^385997770 is an apocalyptic number.

385997770 is a deficient number, since it is larger than the sum of its proper divisors (308798234).

385997770 is a wasteful number, since it uses less digits than its factorization.

385997770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38599784.

The product of its (nonzero) digits is 3333960, while the sum is 55.

The square root of 385997770 is about 19646.8259523008. The cubic root of 385997770 is about 728.1065398256.

The spelling of 385997770 in words is "three hundred eighty-five million, nine hundred ninety-seven thousand, seven hundred seventy".