1388539215090 has 48 divisors (see below), whose sum is σ = 3610487416536. Its totient is φ = 370247846400.

The previous prime is 1388539215067. The next prime is 1388539215127. The reversal of 1388539215090 is 905129358831.

1388539215090 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 539 + 2 + 15 + 0 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1326488903289 + 62050311801 = 1151733^2 + 249099^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546730 + ... + 1753850.

Almost surely, 2^{1388539215090} is an apocalyptic number.

1388539215090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388539215090 is an abundant number, since it is smaller than the sum of its proper divisors (2221948201446).

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

1388539215090 is a wasteful number, since it uses less digits than its factorization.

1388539215090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219915 (or 1219912 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 1388539215090 in words is "one trillion, three hundred eighty-eight billion, five hundred thirty-nine million, two hundred fifteen thousand, ninety".