394639776 has 96 divisors (see below), whose sum is σ = 1165449600. Its totient is φ = 131523264.

The previous prime is 394639741. The next prime is 394639781. The reversal of 394639776 is 677936493.

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

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 67165 + ... + 72803.

It is an arithmetic number, because the mean of its divisors is an integer number (12140100).

Almost surely, 2^394639776 is an apocalyptic number.

394639776 is a gapful number since it is divisible by the number (36) 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 394639776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (582724800).

394639776 is an abundant number, since it is smaller than the sum of its proper divisors (770809824).

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

394639776 is an frugal number, since it uses more digits than its factorization.

394639776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670 (or 5644 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The square root of 394639776 is about 19865.5424290403. The cubic root of 394639776 is about 733.5002822838.

The spelling of 394639776 in words is "three hundred ninety-four million, six hundred thirty-nine thousand, seven hundred seventy-six".