654415385 has 36 divisors (see below), whose sum is σ = 897936228. Its totient is φ = 455084352.

The previous prime is 654415369. The next prime is 654415387. The reversal of 654415385 is 583514456.

It can be written as a sum of positive squares in 2 ways, for example, as 161086864 + 493328521 = 12692^2 + 22211^2 .

It is not a de Polignac number, because 654415385 - 2⁴ = 654415369 is a prime.

It is a super-2 number, since 2×654415385² = 856518992249396450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654415387) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3918572 + ... + 3918738.

It is an arithmetic number, because the mean of its divisors is an integer number (24942673).

Almost surely, 2^654415385 is an apocalyptic number.

654415385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

654415385 is a deficient number, since it is larger than the sum of its proper divisors (243520843).

654415385 is a wasteful number, since it uses less digits than its factorization.

654415385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 204 counting only the distinct ones).

The product of its digits is 288000, while the sum is 41.

The square root of 654415385 is about 25581.5438353513. The cubic root of 654415385 is about 868.1961059771.

The spelling of 654415385 in words is "six hundred fifty-four million, four hundred fifteen thousand, three hundred eighty-five".