1386742480 has 20 divisors (see below), whose sum is σ = 3224176452. Its totient is φ = 554696960.

The previous prime is 1386742477. The next prime is 1386742481. The reversal of 1386742480 is 842476831.

It can be written as a sum of positive squares in 2 ways, for example, as 482417296 + 904325184 = 21964^2 + 30072^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386742481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8667061 + ... + 8667220.

Almost surely, 2^1386742480 is an apocalyptic number.

1386742480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386742480 is an abundant number, since it is smaller than the sum of its proper divisors (1837433972).

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

1386742480 is a wasteful number, since it uses less digits than its factorization.

1386742480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17334294 (or 17334288 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 1386742480 is about 37238.9913934306. The cubic root of 1386742480 is about 1115.1465364060.

The spelling of 1386742480 in words is "one billion, three hundred eighty-six million, seven hundred forty-two thousand, four hundred eighty".