390138452 has 24 divisors (see below), whose sum is σ = 762979392. Its totient is φ = 173009600.

The previous prime is 390138409. The next prime is 390138467. The reversal of 390138452 is 254831093.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106328 + ... + 109935.

It is an arithmetic number, because the mean of its divisors is an integer number (31790808).

Almost surely, 2^390138452 is an apocalyptic number.

It is an amenable number.

390138452 is a deficient number, since it is larger than the sum of its proper divisors (372840940).

390138452 is a wasteful number, since it uses less digits than its factorization.

390138452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216319 (or 216317 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 390138452 is about 19751.9227418497. The cubic root of 390138452 is about 730.7008044586.

The spelling of 390138452 in words is "three hundred ninety million, one hundred thirty-eight thousand, four hundred fifty-two".