390281814 has 112 divisors (see below), whose sum is σ = 964026000. Its totient is φ = 117713088.

The previous prime is 390281813. The next prime is 390281819. The reversal of 390281814 is 418182093.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390281813) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1118112 + ... + 1118460.

It is an arithmetic number, because the mean of its divisors is an integer number (8607375).

Almost surely, 2^390281814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390281814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482013000).

390281814 is an abundant number, since it is smaller than the sum of its proper divisors (573744186).

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

390281814 is a wasteful number, since it uses less digits than its factorization.

390281814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 390281814 is about 19755.5514729405. The cubic root of 390281814 is about 730.7902956803.

The spelling of 390281814 in words is "three hundred ninety million, two hundred eighty-one thousand, eight hundred fourteen".