390889740 has 24 divisors (see below), whose sum is σ = 1094491440. Its totient is φ = 104237248.

The previous prime is 390889711. The next prime is 390889747. The reversal of 390889740 is 47988093.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 390889740.

It is not an unprimeable number, because it can be changed into a prime (390889747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3257355 + ... + 3257474.

It is an arithmetic number, because the mean of its divisors is an integer number (45603810).

Almost surely, 2^390889740 is an apocalyptic number.

390889740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

390889740 is an abundant number, since it is smaller than the sum of its proper divisors (703601700).

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

390889740 is a wasteful number, since it uses less digits than its factorization.

390889740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6514841 (or 6514839 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 390889740 is about 19770.9316927655. The cubic root of 390889740 is about 731.1695395437.

It can be divided in two parts, 39088 and 9740, that added together give a triangular number (48828 = T₃₁₂).

The spelling of 390889740 in words is "three hundred ninety million, eight hundred eighty-nine thousand, seven hundred forty".