1390436212678 has 32 divisors (see below), whose sum is σ = 2149904877120. Its totient is φ = 674026314240.

The previous prime is 1390436212609. The next prime is 1390436212691. The reversal of 1390436212678 is 8762126340931.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8741676 + ... + 8899312.

It is an arithmetic number, because the mean of its divisors is an integer number (67184527410).

Almost surely, 2^{1390436212678} is an apocalyptic number.

1390436212678 is a deficient number, since it is larger than the sum of its proper divisors (759468664442).

1390436212678 is a wasteful number, since it uses less digits than its factorization.

1390436212678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158352.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 1390436212678 in words is "one trillion, three hundred ninety billion, four hundred thirty-six million, two hundred twelve thousand, six hundred seventy-eight".