385840357421 has 8 divisors (see below), whose sum is σ = 415234175544. Its totient is φ = 357190686720.

The previous prime is 385840357369. The next prime is 385840357471. The reversal of 385840357421 is 124753048583.

It can be written as a sum of positive squares in 4 ways, for example, as 128781217321 + 257059140100 = 358861^2 + 507010^2 .

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 385840357421 - 2¹⁰ = 385840356397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385840357421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385840357471) 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, 186035780 + ... + 186037853.

It is an arithmetic number, because the mean of its divisors is an integer number (51904271943).

Almost surely, 2^385840357421 is an apocalyptic number.

It is an amenable number.

385840357421 is a deficient number, since it is larger than the sum of its proper divisors (29393818123).

385840357421 is a wasteful number, since it uses less digits than its factorization.

385840357421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372073711.

The product of its (nonzero) digits is 3225600, while the sum is 50.

The spelling of 385840357421 in words is "three hundred eighty-five billion, eight hundred forty million, three hundred fifty-seven thousand, four hundred twenty-one".