390671730 has 192 divisors, whose sum is σ = 1152403200. Its totient is φ = 91238400.

The previous prime is 390671689. The next prime is 390671753. The reversal of 390671730 is 37176093.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2587155 + ... + 2587305.

It is an arithmetic number, because the mean of its divisors is an integer number (6002100).

Almost surely, 2^390671730 is an apocalyptic number.

390671730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 390671730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (576201600).

390671730 is an abundant number, since it is smaller than the sum of its proper divisors (761731470).

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

390671730 is a wasteful number, since it uses less digits than its factorization.

390671730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 390671730 is about 19765.4175265791. The cubic root of 390671730 is about 731.0335831187.

The spelling of 390671730 in words is "three hundred ninety million, six hundred seventy-one thousand, seven hundred thirty".