385451280 has 60 divisors (see below), whose sum is σ = 1294476300. Its totient is φ = 102786816.

The previous prime is 385451279. The next prime is 385451293. The reversal of 385451280 is 82154583.

It is a happy number.

385451280 is a `hidden beast` number, since 38 + 545 + 1 + 2 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 173923344 + 211527936 = 13188^2 + 14544^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 266955 + ... + 268394.

It is an arithmetic number, because the mean of its divisors is an integer number (21574605).

Almost surely, 2^385451280 is an apocalyptic number.

385451280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

385451280 is an abundant number, since it is smaller than the sum of its proper divisors (909025020).

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

385451280 is a wasteful number, since it uses less digits than its factorization.

385451280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535368 (or 535359 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 385451280 is about 19632.9131816957. The cubic root of 385451280 is about 727.7627633382.

The spelling of 385451280 in words is "three hundred eighty-five million, four hundred fifty-one thousand, two hundred eighty".