385974840 has 32 divisors (see below), whose sum is σ = 1157924880. Its totient is φ = 102926592.

The previous prime is 385974793. The next prime is 385974859. The reversal of 385974840 is 48479583.

It is a super-2 number, since 2×385974840² = 297953154226051200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 385974840.

It is a congruent number.

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, 1608109 + ... + 1608348.

Almost surely, 2^385974840 is an apocalyptic number.

385974840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

385974840 is an abundant number, since it is smaller than the sum of its proper divisors (771950040).

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

385974840 is a wasteful number, since it uses less digits than its factorization.

385974840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216471 (or 3216467 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 385974840 is about 19646.2423888132. The cubic root of 385974840 is about 728.0921219413.

The spelling of 385974840 in words is "three hundred eighty-five million, nine hundred seventy-four thousand, eight hundred forty".