390916 has 6 divisors (see below), whose sum is σ = 684110. Its totient is φ = 195456.

The previous prime is 390893. The next prime is 390953. The reversal of 390916 is 619093.

390916 = T₅₀₉ + T₅₁₀ + T₅₁₁.

It is a happy number.

390916 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 254016 + 136900 = 504^2 + 370^2 .

It is a plaindrome in base 11.

It is a nialpdrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48861 + ... + 48868.

2³⁹⁰⁹¹⁶ is an apocalyptic number.

390916 is the 511-st centered triangular number.

It is an amenable number.

390916 is a deficient number, since it is larger than the sum of its proper divisors (293194).

390916 is a wasteful number, since it uses less digits than its factorization.

390916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97733 (or 97731 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 390916 is about 625.2327566595. The cubic root of 390916 is about 73.1185912517.

The spelling of 390916 in words is "three hundred ninety thousand, nine hundred sixteen".