390390129 has 12 divisors (see below), whose sum is σ = 564172596. Its totient is φ = 260132832.

The previous prime is 390390127. The next prime is 390390137. The reversal of 390390129 is 921093093.

It can be written as a sum of positive squares in 2 ways, for example, as 217415025 + 172975104 = 14745^2 + 13152^2 .

It is not a de Polignac number, because 390390129 - 2¹ = 390390127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 390390093 and 390390102.

It is not an unprimeable number, because it can be changed into a prime (390390127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11179 + ... + 30095.

It is an arithmetic number, because the mean of its divisors is an integer number (47014383).

Almost surely, 2^390390129 is an apocalyptic number.

It is an amenable number.

390390129 is a deficient number, since it is larger than the sum of its proper divisors (173782467).

390390129 is a wasteful number, since it uses less digits than its factorization.

390390129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21216 (or 21213 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 390390129 is about 19758.2926640942. The cubic root of 390390129 is about 730.8578948924.

The spelling of 390390129 in words is "three hundred ninety million, three hundred ninety thousand, one hundred twenty-nine".