655417440 has 96 divisors (see below), whose sum is σ = 2293976160. Its totient is φ = 174776832.

The previous prime is 655417421. The next prime is 655417447. The reversal of 655417440 is 44714556.

655417440 is a `hidden beast` number, since 6 + 5 + 541 + 74 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 655417395 and 655417404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655417447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71539 + ... + 80178.

It is an arithmetic number, because the mean of its divisors is an integer number (23895585).

Almost surely, 2^655417440 is an apocalyptic number.

655417440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

655417440 is an abundant number, since it is smaller than the sum of its proper divisors (1638558720).

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

655417440 is a wasteful number, since it uses less digits than its factorization.

655417440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151741 (or 151727 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 655417440 is about 25601.1218504190. The cubic root of 655417440 is about 868.6390135462.

The spelling of 655417440 in words is "six hundred fifty-five million, four hundred seventeen thousand, four hundred forty".