390520487 has 8 divisors (see below), whose sum is σ = 446448000. Its totient is φ = 334627704.

The previous prime is 390520477. The next prime is 390520489. The reversal of 390520487 is 784025093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-390520487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390520487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390520489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23264 + ... + 36362.

It is an arithmetic number, because the mean of its divisors is an integer number (55806000).

Almost surely, 2^390520487 is an apocalyptic number.

390520487 is a deficient number, since it is larger than the sum of its proper divisors (55927513).

390520487 is a wasteful number, since it uses less digits than its factorization.

390520487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17365.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 390520487 is about 19761.5912061757. The cubic root of 390520487 is about 730.9392345267.

The spelling of 390520487 in words is "three hundred ninety million, five hundred twenty thousand, four hundred eighty-seven".