1385610720 has 576 divisors, whose sum is σ = 5312563200. Its totient is φ = 301916160.

The previous prime is 1385610649. The next prime is 1385610727. The reversal of 1385610720 is 270165831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385610727) 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, 44697105 + ... + 44697135.

It is an arithmetic number, because the mean of its divisors is an integer number (9223200).

Almost surely, 2^1385610720 is an apocalyptic number.

1385610720 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 1385610720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2656281600).

1385610720 is an abundant number, since it is smaller than the sum of its proper divisors (3926952480).

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

1385610720 is a wasteful number, since it uses less digits than its factorization.

1385610720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1385610720 is about 37223.7923914262. The cubic root of 1385610720 is about 1114.8430862323.

The spelling of 1385610720 in words is "one billion, three hundred eighty-five million, six hundred ten thousand, seven hundred twenty".