390028407 has 8 divisors (see below), whose sum is σ = 520168176. Its totient is φ = 259953792.

The previous prime is 390028403. The next prime is 390028421. The reversal of 390028407 is 704820093.

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

It is not a de Polignac number, because 390028407 - 2² = 390028403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390028403) 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, 13 + ... + 27929.

It is an arithmetic number, because the mean of its divisors is an integer number (65021022).

Almost surely, 2^390028407 is an apocalyptic number.

390028407 is a deficient number, since it is larger than the sum of its proper divisors (130139769).

390028407 is a wasteful number, since it uses less digits than its factorization.

390028407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32577.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 390028407 is about 19749.1368672152. The cubic root of 390028407 is about 730.6320959175.

Subtracting 390028407 from its reverse (704820093), we obtain a triangular number (314791686 = T₂₅₀₉₁).

The spelling of 390028407 in words is "three hundred ninety million, twenty-eight thousand, four hundred seven".