1387777530 has 16 divisors (see below), whose sum is σ = 3330666144. Its totient is φ = 370074000.

The previous prime is 1387777487. The next prime is 1387777543. The reversal of 1387777530 is 357777831.

It is a self number, because there is not a number n which added to its sum of digits gives 1387777530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23129596 + ... + 23129655.

It is an arithmetic number, because the mean of its divisors is an integer number (208166634).

Almost surely, 2^1387777530 is an apocalyptic number.

1387777530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387777530 is an abundant number, since it is smaller than the sum of its proper divisors (1942888614).

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

1387777530 is a wasteful number, since it uses less digits than its factorization.

1387777530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46259261.

The product of its (nonzero) digits is 864360, while the sum is 48.

The square root of 1387777530 is about 37252.8861969110. The cubic root of 1387777530 is about 1115.4239119556.

The spelling of 1387777530 in words is "one billion, three hundred eighty-seven million, seven hundred seventy-seven thousand, five hundred thirty".