1385825280 has 176 divisors, whose sum is σ = 5066079360. Its totient is φ = 316735488.

The previous prime is 1385825251. The next prime is 1385825299. The reversal of 1385825280 is 825285831.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 101076 + ... + 113964.

Almost surely, 2^1385825280 is an apocalyptic number.

1385825280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385825280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2533039680).

1385825280 is an abundant number, since it is smaller than the sum of its proper divisors (3680254080).

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

1385825280 is a wasteful number, since it uses less digits than its factorization.

1385825280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12924 (or 12906 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 1385825280 is about 37226.6743075446. The cubic root of 1385825280 is about 1114.9006272582.

The spelling of 1385825280 in words is "one billion, three hundred eighty-five million, eight hundred twenty-five thousand, two hundred eighty".