390638514 has 64 divisors (see below), whose sum is σ = 918376704. Its totient is φ = 108466176.

The previous prime is 390638491. The next prime is 390638519. The reversal of 390638514 is 415836093.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (390638519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250762 + ... + 252314.

It is an arithmetic number, because the mean of its divisors is an integer number (14349636).

Almost surely, 2^390638514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390638514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459188352).

390638514 is an abundant number, since it is smaller than the sum of its proper divisors (527738190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390638514 is a wasteful number, since it uses less digits than its factorization.

390638514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 390638514 is about 19764.5772532579. The cubic root of 390638514 is about 731.0128643602.

The spelling of 390638514 in words is "three hundred ninety million, six hundred thirty-eight thousand, five hundred fourteen".