1385258431 has 8 divisors (see below), whose sum is σ = 1421910000. Its totient is φ = 1348743360.

The previous prime is 1385258423. The next prime is 1385258453. The reversal of 1385258431 is 1348525831.

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 1385258431 - 2³ = 1385258423 is a prime.

It is a super-4 number, since 4×1385258431⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385258461) 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, 13396 + ... + 54313.

It is an arithmetic number, because the mean of its divisors is an integer number (177738750).

Almost surely, 2^1385258431 is an apocalyptic number.

1385258431 is a deficient number, since it is larger than the sum of its proper divisors (36651569).

1385258431 is an equidigital number, since it uses as much as digits as its factorization.

1385258431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68249.

The product of its digits is 115200, while the sum is 40.

The square root of 1385258431 is about 37219.0600499260. The cubic root of 1385258431 is about 1114.7485959497.

The spelling of 1385258431 in words is "one billion, three hundred eighty-five million, two hundred fifty-eight thousand, four hundred thirty-one".