394048520 has 64 divisors (see below), whose sum is σ = 942073200. Its totient is φ = 148055040.

The previous prime is 394048513. The next prime is 394048537. The reversal of 394048520 is 25840493.

It can be written as a sum of positive squares in 8 ways, for example, as 289068004 + 104980516 = 17002^2 + 10246^2 .

It is a super-2 number, since 2×394048520² = 310548472228380800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38330 + ... + 47510.

Almost surely, 2^394048520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394048520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471036600).

394048520 is an abundant number, since it is smaller than the sum of its proper divisors (548024680).

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

394048520 is a wasteful number, since it uses less digits than its factorization.

394048520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9258 (or 9254 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 394048520 is about 19850.6554047971. The cubic root of 394048520 is about 733.1337850077.

The spelling of 394048520 in words is "three hundred ninety-four million, forty-eight thousand, five hundred twenty".