394139025 has 72 divisors (see below), whose sum is σ = 810823104. Its totient is φ = 179280000.

The previous prime is 394139023. The next prime is 394139041. The reversal of 394139025 is 520931493.

It is a happy number.

It is not a de Polignac number, because 394139025 - 2¹ = 394139023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394139023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 394827 + ... + 395823.

It is an arithmetic number, because the mean of its divisors is an integer number (11261432).

Almost surely, 2^394139025 is an apocalyptic number.

394139025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

394139025 is an abundant number, since it is smaller than the sum of its proper divisors (416684079).

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

394139025 is a wasteful number, since it uses less digits than its factorization.

394139025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 394139025 is about 19852.9349215676. The cubic root of 394139025 is about 733.1899093939.

The spelling of 394139025 in words is "three hundred ninety-four million, one hundred thirty-nine thousand, twenty-five".