390146421 has 8 divisors (see below), whose sum is σ = 594508864. Its totient is φ = 222940800.

The previous prime is 390146411. The next prime is 390146429. The reversal of 390146421 is 124641093.

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

It is not a de Polignac number, because 390146421 - 2⁶ = 390146357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390146429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9289180 + ... + 9289221.

It is an arithmetic number, because the mean of its divisors is an integer number (74313608).

Almost surely, 2^390146421 is an apocalyptic number.

It is an amenable number.

390146421 is a deficient number, since it is larger than the sum of its proper divisors (204362443).

390146421 is a wasteful number, since it uses less digits than its factorization.

390146421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18578411.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 390146421 is about 19752.1244680161. The cubic root of 390146421 is about 730.7057795429.

The spelling of 390146421 in words is "three hundred ninety million, one hundred forty-six thousand, four hundred twenty-one".