1390439212 has 12 divisors (see below), whose sum is σ = 2442249376. Its totient is φ = 692653680.

The previous prime is 1390439201. The next prime is 1390439261. The reversal of 1390439212 is 2129340931.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640263 + ... + 642430.

Almost surely, 2^1390439212 is an apocalyptic number.

It is an amenable number.

1390439212 is a deficient number, since it is larger than the sum of its proper divisors (1051810164).

1390439212 is a wasteful number, since it uses less digits than its factorization.

1390439212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282968 (or 1282966 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1390439212 is about 37288.5935910702. The cubic root of 1390439212 is about 1116.1365640531.

The spelling of 1390439212 in words is "one billion, three hundred ninety million, four hundred thirty-nine thousand, two hundred twelve".