390880634 has 8 divisors (see below), whose sum is σ = 600621588. Its totient is φ = 190673440.

The previous prime is 390880627. The next prime is 390880657. The reversal of 390880634 is 436088093.

It can be written as a sum of positive squares in 2 ways, for example, as 384042409 + 6838225 = 19597^2 + 2615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 390880591 and 390880600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383337 + ... + 2383500.

Almost surely, 2^390880634 is an apocalyptic number.

390880634 is a deficient number, since it is larger than the sum of its proper divisors (209740954).

390880634 is a wasteful number, since it uses less digits than its factorization.

390880634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766880.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 390880634 is about 19770.7014038450. The cubic root of 390880634 is about 731.1638618287.

The spelling of 390880634 in words is "three hundred ninety million, eight hundred eighty thousand, six hundred thirty-four".