394614780 has 96 divisors (see below), whose sum is σ = 1265617920. Its totient is φ = 89994240.

The previous prime is 394614767. The next prime is 394614799. The reversal of 394614780 is 87416493.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 264276 + ... + 265764.

It is an arithmetic number, because the mean of its divisors is an integer number (13183520).

Almost surely, 2^394614780 is an apocalyptic number.

394614780 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 394614780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632808960).

394614780 is an abundant number, since it is smaller than the sum of its proper divisors (871003140).

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

394614780 is a wasteful number, since it uses less digits than its factorization.

394614780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 394614780 is about 19864.9132895163. The cubic root of 394614780 is about 733.4847956203.

The spelling of 394614780 in words is "three hundred ninety-four million, six hundred fourteen thousand, seven hundred eighty".