390678129391 has 16 divisors (see below), whose sum is σ = 433971359136. Its totient is φ = 351645360000.

The previous prime is 390678129389. The next prime is 390678129437. The reversal of 390678129391 is 193921876093.

390678129391 = T₈₀₂₉₈ + T₈₀₂₉₉ + ... + T₈₀₄₁₈.

It is not a de Polignac number, because 390678129391 - 2¹ = 390678129389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390678129311) 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, 1318650 + ... + 1587511.

It is an arithmetic number, because the mean of its divisors is an integer number (27123209946).

Almost surely, 2^390678129391 is an apocalyptic number.

390678129391 is a deficient number, since it is larger than the sum of its proper divisors (43293229745).

390678129391 is a wasteful number, since it uses less digits than its factorization.

390678129391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906295 (or 2906273 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 390678129391 in words is "three hundred ninety billion, six hundred seventy-eight million, one hundred twenty-nine thousand, three hundred ninety-one".