390284646 has 32 divisors (see below), whose sum is σ = 795312000. Its totient is φ = 127646400.

The previous prime is 390284627. The next prime is 390284647. The reversal of 390284646 is 646482093.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 390284598 and 390284607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390284647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370821 + ... + 371871.

It is an arithmetic number, because the mean of its divisors is an integer number (24853500).

Almost surely, 2^390284646 is an apocalyptic number.

390284646 is an abundant number, since it is smaller than the sum of its proper divisors (405027354).

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

390284646 is a wasteful number, since it uses less digits than its factorization.

390284646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 390284646 is about 19755.6231488657. The cubic root of 390284646 is about 730.7920632860.

The spelling of 390284646 in words is "three hundred ninety million, two hundred eighty-four thousand, six hundred forty-six".