384640025 has 24 divisors (see below), whose sum is σ = 594646464. Its totient is φ = 239774400.

The previous prime is 384639979. The next prime is 384640037. The reversal of 384640025 is 520046483.

It is not a de Polignac number, because 384640025 - 2⁸ = 384639769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 384639973 and 384640000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97982 + ... + 101831.

It is an arithmetic number, because the mean of its divisors is an integer number (24776936).

Almost surely, 2^384640025 is an apocalyptic number.

384640025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

384640025 is a deficient number, since it is larger than the sum of its proper divisors (210006439).

384640025 is a wasteful number, since it uses less digits than its factorization.

384640025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199841 (or 199836 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 384640025 is about 19612.2417127671. The cubic root of 384640025 is about 727.2518333368.

The spelling of 384640025 in words is "three hundred eighty-four million, six hundred forty thousand, twenty-five".