390943432887 has 16 divisors (see below), whose sum is σ = 595732780800. Its totient is φ = 223392701952.

The previous prime is 390943432883. The next prime is 390943432931. The reversal of 390943432887 is 788234349093.

It is not a de Polignac number, because 390943432887 - 2² = 390943432883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 390943432887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390943432883) 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, 1810903 + ... + 2015255.

It is an arithmetic number, because the mean of its divisors is an integer number (37233298800).

Almost surely, 2^390943432887 is an apocalyptic number.

390943432887 is a deficient number, since it is larger than the sum of its proper divisors (204789347913).

390943432887 is a wasteful number, since it uses less digits than its factorization.

390943432887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295462.

The product of its (nonzero) digits is 31352832, while the sum is 60.

The spelling of 390943432887 in words is "three hundred ninety billion, nine hundred forty-three million, four hundred thirty-two thousand, eight hundred eighty-seven".