390028380 has 96 divisors (see below), whose sum is σ = 1251264000. Its totient is φ = 88922880.

The previous prime is 390028369. The next prime is 390028381. The reversal of 390028380 is 83820093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390028381) 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, 208650 + ... + 210510.

It is an arithmetic number, because the mean of its divisors is an integer number (13034000).

Almost surely, 2^390028380 is an apocalyptic number.

390028380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390028380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625632000).

390028380 is an abundant number, since it is smaller than the sum of its proper divisors (861235620).

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

390028380 is a wasteful number, since it uses less digits than its factorization.

390028380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 390028380 is about 19749.1361836410. The cubic root of 390028380 is about 730.6320790580.

The spelling of 390028380 in words is "three hundred ninety million, twenty-eight thousand, three hundred eighty".