1388427507 has 36 divisors (see below), whose sum is σ = 2107169560. Its totient is φ = 903546000.

The previous prime is 1388427487. The next prime is 1388427511. The reversal of 1388427507 is 7057248831.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1388427507 is a `hidden beast` number, since 138 + 8 + 4 + 2 + 7 + 507 = 666.

It is not a de Polignac number, because 1388427507 - 2¹¹ = 1388425459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388428507) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13746757 + ... + 13746857.

Almost surely, 2^1388427507 is an apocalyptic number.

1388427507 is a deficient number, since it is larger than the sum of its proper divisors (718742053).

1388427507 is an frugal number, since it uses more digits than its factorization.

1388427507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 1388427507 is about 37261.6090232293. The cubic root of 1388427507 is about 1115.5980240917.

The spelling of 1388427507 in words is "one billion, three hundred eighty-eight million, four hundred twenty-seven thousand, five hundred seven".