390081380 has 192 divisors, whose sum is σ = 991001088. Its totient is φ = 127733760.

The previous prime is 390081361. The next prime is 390081383. The reversal of 390081380 is 83180093.

It is not an unprimeable number, because it can be changed into a prime (390081383) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9071639 + ... + 9071681.

It is an arithmetic number, because the mean of its divisors is an integer number (5161464).

Almost surely, 2^390081380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390081380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (495500544).

390081380 is an abundant number, since it is smaller than the sum of its proper divisors (600919708).

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

390081380 is a wasteful number, since it uses less digits than its factorization.

390081380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 390081380 is about 19750.4779688999. The cubic root of 390081380 is about 730.6651721595.

The spelling of 390081380 in words is "three hundred ninety million, eighty-one thousand, three hundred eighty".