385491900 has 72 divisors (see below), whose sum is σ = 1145534320. Its totient is φ = 100016640.

The previous prime is 385491889. The next prime is 385491901. The reversal of 385491900 is 9194583.

385491900 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×385491900² = 297208009931220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385491901) 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 23 ways as a sum of consecutive naturals, for example, 6265 + ... + 28464.

Almost surely, 2^385491900 is an apocalyptic number.

385491900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

385491900 is an abundant number, since it is smaller than the sum of its proper divisors (760042420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385491900 is a wasteful number, since it uses less digits than its factorization.

385491900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34783 (or 34776 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 385491900 is about 19633.9476417760. The cubic root of 385491900 is about 727.7883270403.

The spelling of 385491900 in words is "three hundred eighty-five million, four hundred ninety-one thousand, nine hundred".