1388601536 has 28 divisors (see below), whose sum is σ = 3149150928. Its totient is φ = 595114752.

The previous prime is 1388601523. The next prime is 1388601541. The reversal of 1388601536 is 6351068831.

It is a tau number, because it is divible by the number of its divisors (28).

It is a junction number, because it is equal to n+sod(n) for n = 1388601493 and 1388601502.

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, 1549331 + ... + 1550226.

It is an arithmetic number, because the mean of its divisors is an integer number (112469676).

Almost surely, 2^1388601536 is an apocalyptic number.

1388601536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1388601536 is an abundant number, since it is smaller than the sum of its proper divisors (1760549392).

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

1388601536 is an equidigital number, since it uses as much as digits as its factorization.

1388601536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099576 (or 3099566 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1388601536 is about 37263.9441820106. The cubic root of 1388601536 is about 1115.6446327663.

The spelling of 1388601536 in words is "one billion, three hundred eighty-eight million, six hundred one thousand, five hundred thirty-six".