394427040 has 96 divisors (see below), whose sum is σ = 1419949440. Its totient is φ = 90153984.

The previous prime is 394427009. The next prime is 394427051. The reversal of 394427040 is 40724493.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 394426992 and 394427010.

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, 55335 + ... + 62054.

It is an arithmetic number, because the mean of its divisors is an integer number (14791140).

Almost surely, 2^394427040 is an apocalyptic number.

394427040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394427040 is an abundant number, since it is smaller than the sum of its proper divisors (1025522400).

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

394427040 is a wasteful number, since it uses less digits than its factorization.

394427040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117414 (or 117406 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 394427040 is about 19860.1873102949. The cubic root of 394427040 is about 733.3684574545.

The spelling of 394427040 in words is "three hundred ninety-four million, four hundred twenty-seven thousand, forty".