1385951472 has 140 divisors (see below), whose sum is σ = 4157037504. Its totient is φ = 446964480.

The previous prime is 1385951449. The next prime is 1385951491. The reversal of 1385951472 is 2741595831.

1385951472 is a `hidden beast` number, since 13 + 8 + 59 + 514 + 72 = 666.

It is a super-2 number, since 2×1385951472² = 3841722965477933568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 359668 + ... + 363500.

Almost surely, 2^1385951472 is an apocalyptic number.

1385951472 is a gapful number since it is divisible by the number (12) 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 1385951472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078518752).

1385951472 is an abundant number, since it is smaller than the sum of its proper divisors (2771086032).

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

1385951472 is an equidigital number, since it uses as much as digits as its factorization.

1385951472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890 (or 3869 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 1385951472 is about 37228.3691826542. The cubic root of 1385951472 is about 1114.9344668463.

The spelling of 1385951472 in words is "one billion, three hundred eighty-five million, nine hundred fifty-one thousand, four hundred seventy-two".