390453438 has 16 divisors (see below), whose sum is σ = 795641616. Its totient is φ = 127695360.

The previous prime is 390453431. The next prime is 390453443. The reversal of 390453438 is 834354093.

It is a junction number, because it is equal to n+sod(n) for n = 390453396 and 390453405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390453431) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 613603 + ... + 614238.

It is an arithmetic number, because the mean of its divisors is an integer number (49727601).

Almost surely, 2^390453438 is an apocalyptic number.

390453438 is an abundant number, since it is smaller than the sum of its proper divisors (405188178).

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

390453438 is a wasteful number, since it uses less digits than its factorization.

390453438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227899.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 390453438 is about 19759.8946859542. The cubic root of 390453438 is about 730.8974001446.

The spelling of 390453438 in words is "three hundred ninety million, four hundred fifty-three thousand, four hundred thirty-eight".