1385757320 has 32 divisors (see below), whose sum is σ = 3123063000. Its totient is φ = 553394688.

The previous prime is 1385757301. The next prime is 1385757341. The reversal of 1385757320 is 237575831.

It can be written as a sum of positive squares in 4 ways, for example, as 916515076 + 469242244 = 30274^2 + 21662^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 52754.

Almost surely, 2^1385757320 is an apocalyptic number.

1385757320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385757320 is an abundant number, since it is smaller than the sum of its proper divisors (1737305680).

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

1385757320 is a wasteful number, since it uses less digits than its factorization.

1385757320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56777 (or 56773 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 1385757320 is about 37225.7615100081. The cubic root of 1385757320 is about 1114.8824022852.

The spelling of 1385757320 in words is "one billion, three hundred eighty-five million, seven hundred fifty-seven thousand, three hundred twenty".