390395940 has 48 divisors (see below), whose sum is σ = 1192484160. Its totient is φ = 94641280.

The previous prime is 390395911. The next prime is 390395969. The reversal of 390395940 is 49593093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (390395911) and next prime (390395969).

It is a junction number, because it is equal to n+sod(n) for n = 390395892 and 390395901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295095 + ... + 296414.

It is an arithmetic number, because the mean of its divisors is an integer number (24843420).

Almost surely, 2^390395940 is an apocalyptic number.

390395940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

390395940 is an abundant number, since it is smaller than the sum of its proper divisors (802088220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

390395940 is a wasteful number, since it uses less digits than its factorization.

390395940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591532 (or 591530 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 390395940 is about 19758.4397157265. The cubic root of 390395940 is about 730.8615211744.

The spelling of 390395940 in words is "three hundred ninety million, three hundred ninety-five thousand, nine hundred forty".