395178420 has 192 divisors, whose sum is σ = 1373492736. Its totient is φ = 82667520.

The previous prime is 395178409. The next prime is 395178457. The reversal of 395178420 is 24871593.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 856990 + ... + 857450.

It is an arithmetic number, because the mean of its divisors is an integer number (7153608).

Almost surely, 2^395178420 is an apocalyptic number.

395178420 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 395178420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686746368).

395178420 is an abundant number, since it is smaller than the sum of its proper divisors (978314316).

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

395178420 is a wasteful number, since it uses less digits than its factorization.

395178420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 395178420 is about 19879.0950498256. The cubic root of 395178420 is about 733.8338488516.

The spelling of 395178420 in words is "three hundred ninety-five million, one hundred seventy-eight thousand, four hundred twenty".