390234720 has 192 divisors, whose sum is σ = 1280240640. Its totient is φ = 99840000.

The previous prime is 390234683. The next prime is 390234743. The reversal of 390234720 is 27432093.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1554595 + ... + 1554845.

It is an arithmetic number, because the mean of its divisors is an integer number (6667920).

Almost surely, 2^390234720 is an apocalyptic number.

390234720 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 390234720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640120320).

390234720 is an abundant number, since it is smaller than the sum of its proper divisors (890005920).

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

390234720 is a wasteful number, since it uses less digits than its factorization.

390234720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 390234720 is about 19754.3595188505. The cubic root of 390234720 is about 730.7609004917.

The spelling of 390234720 in words is "three hundred ninety million, two hundred thirty-four thousand, seven hundred twenty".