395421376840 has 64 divisors (see below), whose sum is σ = 1017624706560. Its totient is φ = 135462792960.

The previous prime is 395421376793. The next prime is 395421376901. The reversal of 395421376840 is 48673124593.

It is a happy number.

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, 228927 + ... + 918286.

It is an arithmetic number, because the mean of its divisors is an integer number (15900386040).

It is a 1-persistent number, because it is pandigital, but 2⋅395421376840 = 790842753680 is not.

Almost surely, 2^395421376840 is an apocalyptic number.

It is an amenable number.

395421376840 is an abundant number, since it is smaller than the sum of its proper divisors (622203329720).

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

395421376840 is a wasteful number, since it uses less digits than its factorization.

395421376840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148462 (or 1148458 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 395421376840 in words is "three hundred ninety-five billion, four hundred twenty-one million, three hundred seventy-six thousand, eight hundred forty".