385124280 has 64 divisors (see below), whose sum is σ = 1164240000. Its totient is φ = 101911680.

The previous prime is 385124279. The next prime is 385124287. The reversal of 385124280 is 82421583.

It is a super-2 number, since 2×385124280² = 296641422091036800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385124287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3471 + ... + 27969.

It is an arithmetic number, because the mean of its divisors is an integer number (18191250).

Almost surely, 2^385124280 is an apocalyptic number.

385124280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385124280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582120000).

385124280 is an abundant number, since it is smaller than the sum of its proper divisors (779115720).

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

385124280 is a wasteful number, since it uses less digits than its factorization.

385124280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24644 (or 24640 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 385124280 is about 19624.5835624606. The cubic root of 385124280 is about 727.5569044186.

The spelling of 385124280 in words is "three hundred eighty-five million, one hundred twenty-four thousand, two hundred eighty".