1385337472 has 64 divisors (see below), whose sum is σ = 2888395200. Its totient is φ = 660588544.

The previous prime is 1385337451. The next prime is 1385337487. The reversal of 1385337472 is 2747335831.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1385337472² = 3838319822654701568, which contains 22 as substring.

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, 1674723 + ... + 1675549.

It is an arithmetic number, because the mean of its divisors is an integer number (45131175).

Almost surely, 2^1385337472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1385337472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444197600).

1385337472 is an abundant number, since it is smaller than the sum of its proper divisors (1503057728).

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

1385337472 is an equidigital number, since it uses as much as digits as its factorization.

1385337472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433 (or 1421 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The square root of 1385337472 is about 37220.1218697629. The cubic root of 1385337472 is about 1114.7697975695.

The spelling of 1385337472 in words is "one billion, three hundred eighty-five million, three hundred thirty-seven thousand, four hundred seventy-two".