395780399 has 12 divisors (see below), whose sum is σ = 463717800. Its totient is φ = 336793968.

The previous prime is 395780347. The next prime is 395780401. The reversal of 395780399 is 993087593.

It is a de Polignac number, because none of the positive numbers 2^k-395780399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 395780399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395785399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22244 + ... + 35865.

It is an arithmetic number, because the mean of its divisors is an integer number (38643150).

Almost surely, 2^395780399 is an apocalyptic number.

395780399 is a deficient number, since it is larger than the sum of its proper divisors (67937401).

395780399 is a wasteful number, since it uses less digits than its factorization.

395780399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58262 (or 58255 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 395780399 is about 19894.2302942336. The cubic root of 395780399 is about 734.2062784726.

The spelling of 395780399 in words is "three hundred ninety-five million, seven hundred eighty thousand, three hundred ninety-nine".