390779281492 has 6 divisors (see below), whose sum is σ = 683863742618. Its totient is φ = 195389640744.

The previous prime is 390779281483. The next prime is 390779281493. The reversal of 390779281492 is 294182977093.

It can be written as a sum of positive squares in only one way, i.e., 292806525456 + 97972756036 = 541116^2 + 313006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 390779281492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390779281493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48847410183 + ... + 48847410190.

Almost surely, 2^390779281492 is an apocalyptic number.

It is an amenable number.

390779281492 is a deficient number, since it is larger than the sum of its proper divisors (293084461126).

390779281492 is a wasteful number, since it uses less digits than its factorization.

390779281492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97694820377 (or 97694820375 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 390779281492 in words is "three hundred ninety billion, seven hundred seventy-nine million, two hundred eighty-one thousand, four hundred ninety-two".