1390468988 has 6 divisors (see below), whose sum is σ = 2433320736. Its totient is φ = 695234492.

The previous prime is 1390468987. The next prime is 1390469029. The reversal of 1390468988 is 8898640931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390468987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173808620 + ... + 173808627.

It is an arithmetic number, because the mean of its divisors is an integer number (405553456).

Almost surely, 2^1390468988 is an apocalyptic number.

It is an amenable number.

1390468988 is a deficient number, since it is larger than the sum of its proper divisors (1042851748).

1390468988 is a wasteful number, since it uses less digits than its factorization.

1390468988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347617251 (or 347617249 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 56.

The square root of 1390468988 is about 37288.9928531195. The cubic root of 1390468988 is about 1116.1445312827.

The spelling of 1390468988 in words is "one billion, three hundred ninety million, four hundred sixty-eight thousand, nine hundred eighty-eight".