394759980 has 120 divisors (see below), whose sum is σ = 1257205488. Its totient is φ = 103669632.

The previous prime is 394759961. The next prime is 394759991. The reversal of 394759980 is 89957493.

394759980 is a `hidden beast` number, since 3 + 9 + 47 + 599 + 8 + 0 = 666.

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 39 ways as a sum of consecutive naturals, for example, 106722 + ... + 110358.

Almost surely, 2^394759980 is an apocalyptic number.

394759980 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 394759980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628602744).

394759980 is an abundant number, since it is smaller than the sum of its proper divisors (862445508).

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

394759980 is a wasteful number, since it uses less digits than its factorization.

394759980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3714 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 394759980 is about 19868.5676383578. The cubic root of 394759980 is about 733.5747474229.

It can be divided in two parts, 39475 and 9980, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 394759980 in words is "three hundred ninety-four million, seven hundred fifty-nine thousand, nine hundred eighty".