1387806744 has 16 divisors (see below), whose sum is σ = 3469516920. Its totient is φ = 462602240.

The previous prime is 1387806727. The next prime is 1387806751. The reversal of 1387806744 is 4476087831.

It is a junction number, because it is equal to n+sod(n) for n = 1387806693 and 1387806702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28912617 + ... + 28912664.

Almost surely, 2^1387806744 is an apocalyptic number.

It is an amenable number.

1387806744 is an abundant number, since it is smaller than the sum of its proper divisors (2081710176).

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

1387806744 is a wasteful number, since it uses less digits than its factorization.

1387806744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57825290 (or 57825286 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 1387806744 is about 37253.2782986947. The cubic root of 1387806744 is about 1115.4317388021.

The spelling of 1387806744 in words is "one billion, three hundred eighty-seven million, eight hundred six thousand, seven hundred forty-four".