385370021 has 8 divisors (see below), whose sum is σ = 399826944. Its totient is φ = 371039760.

The previous prime is 385370017. The next prime is 385370057. The reversal of 385370021 is 120073583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385370021 - 2² = 385370017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385376021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25445 + ... + 37658.

It is an arithmetic number, because the mean of its divisors is an integer number (49978368).

Almost surely, 2^385370021 is an apocalyptic number.

385370021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

385370021 is a deficient number, since it is larger than the sum of its proper divisors (14456923).

385370021 is a wasteful number, since it uses less digits than its factorization.

385370021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63331.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 385370021 is about 19630.8436140681. The cubic root of 385370021 is about 727.7116185861.

The spelling of 385370021 in words is "three hundred eighty-five million, three hundred seventy thousand, twenty-one".