1385259750 has 192 divisors, whose sum is σ = 4309808256. Its totient is φ = 314496000.

The previous prime is 1385259727. The next prime is 1385259751. The reversal of 1385259750 is 579525831.

1385259750 is a `hidden beast` number, since 1 + 3 + 8 + 5 + 2 + 597 + 50 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1385259696 and 1385259705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385259751) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4425594 + ... + 4425906.

It is an arithmetic number, because the mean of its divisors is an integer number (22446918).

Almost surely, 2^1385259750 is an apocalyptic number.

1385259750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385259750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154904128).

1385259750 is an abundant number, since it is smaller than the sum of its proper divisors (2924548506).

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

1385259750 is a wasteful number, since it uses less digits than its factorization.

1385259750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 1385259750 is about 37219.0777693376. The cubic root of 1385259750 is about 1114.7489497592.

The spelling of 1385259750 in words is "one billion, three hundred eighty-five million, two hundred fifty-nine thousand, seven hundred fifty".