1387965612390 has 64 divisors (see below), whose sum is σ = 3808880008704. Its totient is φ = 317091898368.

The previous prime is 1387965612343. The next prime is 1387965612437. The reversal of 1387965612390 is 932165697831.

It is an interprime number because it is at equal distance from previous prime (1387965612343) and next prime (1387965612437).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1214844 + ... + 2061983.

It is an arithmetic number, because the mean of its divisors is an integer number (59513750136).

Almost surely, 2^{1387965612390} is an apocalyptic number.

1387965612390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1387965612390 is an abundant number, since it is smaller than the sum of its proper divisors (2420914396314).

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

1387965612390 is a wasteful number, since it uses less digits than its factorization.

1387965612390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278861.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 1387965612390 in words is "one trillion, three hundred eighty-seven billion, nine hundred sixty-five million, six hundred twelve thousand, three hundred ninety".