1390128086438 has 64 divisors (see below), whose sum is σ = 2656560291840. Its totient is φ = 530717529600.

The previous prime is 1390128086419. The next prime is 1390128086519. The reversal of 1390128086438 is 8346808210931.

It is a self number, because there is not a number n which added to its sum of digits gives 1390128086438.

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, 1682318 + ... + 2368638.

It is an arithmetic number, because the mean of its divisors is an integer number (41508754560).

Almost surely, 2^{1390128086438} is an apocalyptic number.

1390128086438 is a deficient number, since it is larger than the sum of its proper divisors (1266432205402).

1390128086438 is a wasteful number, since it uses less digits than its factorization.

1390128086438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686733.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 1390128086438 in words is "one trillion, three hundred ninety billion, one hundred twenty-eight million, eighty-six thousand, four hundred thirty-eight".