1387721082 has 32 divisors (see below), whose sum is σ = 3038966784. Its totient is φ = 418964400.

The previous prime is 1387721063. The next prime is 1387721089. The reversal of 1387721082 is 2801277831.

It is a self number, because there is not a number n which added to its sum of digits gives 1387721082.

It is not an unprimeable number, because it can be changed into a prime (1387721089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20908 + ... + 56679.

It is an arithmetic number, because the mean of its divisors is an integer number (94967712).

Almost surely, 2^1387721082 is an apocalyptic number.

1387721082 is an abundant number, since it is smaller than the sum of its proper divisors (1651245702).

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

1387721082 is a wasteful number, since it uses less digits than its factorization.

1387721082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77874.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 1387721082 is about 37252.1285566342. The cubic root of 1387721082 is about 1115.4087884214.

The spelling of 1387721082 in words is "one billion, three hundred eighty-seven million, seven hundred twenty-one thousand, eighty-two".