394760040 has 128 divisors (see below), whose sum is σ = 1242604800. Its totient is φ = 100136960.

The previous prime is 394760029. The next prime is 394760053. The reversal of 394760040 is 40067493.

It is a junction number, because it is equal to n+sod(n) for n = 394759983 and 394760010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 775306 + ... + 775814.

It is an arithmetic number, because the mean of its divisors is an integer number (9707850).

Almost surely, 2^394760040 is an apocalyptic number.

394760040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394760040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621302400).

394760040 is an abundant number, since it is smaller than the sum of its proper divisors (847844760).

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

394760040 is a wasteful number, since it uses less digits than its factorization.

394760040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 394760040 is about 19868.5691482804. The cubic root of 394760040 is about 733.5747845885.

The spelling of 394760040 in words is "three hundred ninety-four million, seven hundred sixty thousand, forty".