387430864 has 20 divisors (see below), whose sum is σ = 752451840. Its totient is φ = 193249760.

The previous prime is 387430861. The next prime is 387430873. The reversal of 387430864 is 468034783.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 387430864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387430861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22192 + ... + 35599.

It is an arithmetic number, because the mean of its divisors is an integer number (37622592).

Almost surely, 2^387430864 is an apocalyptic number.

It is an amenable number.

387430864 is a deficient number, since it is larger than the sum of its proper divisors (365020976).

387430864 is a wasteful number, since it uses less digits than its factorization.

387430864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58218 (or 58212 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 387430864 is about 19683.2635505396. The cubic root of 387430864 is about 729.0065074062.

The spelling of 387430864 in words is "three hundred eighty-seven million, four hundred thirty thousand, eight hundred sixty-four".