390553391440 has 40 divisors (see below), whose sum is σ = 908062985160. Its totient is φ = 156216823296.

The previous prime is 390553391411. The next prime is 390553391441. The reversal of 390553391440 is 44193355093.

It can be written as a sum of positive squares in 4 ways, for example, as 132420298816 + 258133092624 = 363896^2 + 508068^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390553391441) 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, 4694526 + ... + 4776994.

It is an arithmetic number, because the mean of its divisors is an integer number (22701574629).

Almost surely, 2^390553391440 is an apocalyptic number.

It is an amenable number.

390553391440 is an abundant number, since it is smaller than the sum of its proper divisors (517509593720).

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

390553391440 is a wasteful number, since it uses less digits than its factorization.

390553391440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141679 (or 141673 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 46.

The spelling of 390553391440 in words is "three hundred ninety billion, five hundred fifty-three million, three hundred ninety-one thousand, four hundred forty".