385287044040 has 64 divisors (see below), whose sum is σ = 1284290150400. Its totient is φ = 102743211456.

The previous prime is 385287044029. The next prime is 385287044059. The reversal of 385287044040 is 40440782583.

It is a happy number.

385287044040 is a `hidden beast` number, since 3 + 85 + 28 + 70 + 440 + 40 = 666.

It is a super-2 number, since 2×385287044040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178372552 + ... + 178374711.

It is an arithmetic number, because the mean of its divisors is an integer number (20067033600).

Almost surely, 2^385287044040 is an apocalyptic number.

385287044040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

385287044040 is an abundant number, since it is smaller than the sum of its proper divisors (899003106360).

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

385287044040 is a wasteful number, since it uses less digits than its factorization.

385287044040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356747283 (or 356747273 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 385287044040 in words is "three hundred eighty-five billion, two hundred eighty-seven million, forty-four thousand, forty".