391480688 has 10 divisors (see below), whose sum is σ = 758493864. Its totient is φ = 195740336.

The previous prime is 391480673. The next prime is 391480721. The reversal of 391480688 is 886084193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12233756 + ... + 12233787.

Almost surely, 2^391480688 is an apocalyptic number.

It is an amenable number.

391480688 is a deficient number, since it is larger than the sum of its proper divisors (367013176).

391480688 is a wasteful number, since it uses less digits than its factorization.

391480688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24467551 (or 24467545 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 391480688 is about 19785.8709184104. The cubic root of 391480688 is about 731.5378152782.

The spelling of 391480688 in words is "three hundred ninety-one million, four hundred eighty thousand, six hundred eighty-eight".