394427880 has 768 divisors, whose sum is σ = 1811496960. Its totient is φ = 74649600.

The previous prime is 394427879. The next prime is 394427893. The reversal of 394427880 is 88724493.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12723465 + ... + 12723495.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^394427880 is an apocalyptic number.

394427880 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 394427880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905748480).

394427880 is an abundant number, since it is smaller than the sum of its proper divisors (1417069080).

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

394427880 is a wasteful number, since it uses less digits than its factorization.

394427880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 394427880 is about 19860.2084581205. The cubic root of 394427880 is about 733.3689780654.

The spelling of 394427880 in words is "three hundred ninety-four million, four hundred twenty-seven thousand, eight hundred eighty".