390568542 has 128 divisors (see below), whose sum is σ = 1002516480. Its totient is φ = 98703360.

The previous prime is 390568537. The next prime is 390568547. The reversal of 390568542 is 245865093.

It is an interprime number because it is at equal distance from previous prime (390568537) and next prime (390568547).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 390568494 and 390568503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390568547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1634059 + ... + 1634297.

It is an arithmetic number, because the mean of its divisors is an integer number (7832160).

Almost surely, 2^390568542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390568542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501258240).

390568542 is an abundant number, since it is smaller than the sum of its proper divisors (611947938).

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

390568542 is a wasteful number, since it uses less digits than its factorization.

390568542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 390568542 is about 19762.8070374631. The cubic root of 390568542 is about 730.9692148951.

The spelling of 390568542 in words is "three hundred ninety million, five hundred sixty-eight thousand, five hundred forty-two".