385271240 has 32 divisors (see below), whose sum is σ = 874541880. Its totient is φ = 152742912.

The previous prime is 385271233. The next prime is 385271273. The reversal of 385271240 is 42172583.

It can be written as a sum of positive squares in 4 ways, for example, as 226863844 + 158407396 = 15062^2 + 12586^2 .

It is a super-2 number, since 2×385271240² = 296867856742275200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 385271197 and 385271206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38099 + ... + 47138.

Almost surely, 2^385271240 is an apocalyptic number.

It is an amenable number.

385271240 is an abundant number, since it is smaller than the sum of its proper divisors (489270640).

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

385271240 is a wasteful number, since it uses less digits than its factorization.

385271240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85361 (or 85357 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 385271240 is about 19628.3274886069. The cubic root of 385271240 is about 727.6494357312.

The spelling of 385271240 in words is "three hundred eighty-five million, two hundred seventy-one thousand, two hundred forty".