1387465744 has 80 divisors (see below), whose sum is σ = 3267648000. Its totient is φ = 557125632.

The previous prime is 1387465711. The next prime is 1387465757. The reversal of 1387465744 is 4475647831.

It is a super-2 number, since 2×1387465744² = 3850122381546947072, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453532 + ... + 456580.

It is an arithmetic number, because the mean of its divisors is an integer number (40845600).

Almost surely, 2^1387465744 is an apocalyptic number.

1387465744 is a gapful number since it is divisible by the number (14) 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 1387465744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1633824000).

1387465744 is an abundant number, since it is smaller than the sum of its proper divisors (1880182256).

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

1387465744 is a wasteful number, since it uses less digits than its factorization.

1387465744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3320 (or 3314 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 49.

The square root of 1387465744 is about 37248.7012391036. The cubic root of 1387465744 is about 1115.3403732039.

The spelling of 1387465744 in words is "one billion, three hundred eighty-seven million, four hundred sixty-five thousand, seven hundred forty-four".