654865440 has 48 divisors (see below), whose sum is σ = 2062827648. Its totient is φ = 174630656.

The previous prime is 654865427. The next prime is 654865459. The reversal of 654865440 is 44568456.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 654865392 and 654865401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681672 + ... + 682631.

It is an arithmetic number, because the mean of its divisors is an integer number (42975576).

Almost surely, 2^654865440 is an apocalyptic number.

654865440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

654865440 is an abundant number, since it is smaller than the sum of its proper divisors (1407962208).

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

654865440 is a wasteful number, since it uses less digits than its factorization.

654865440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364321 (or 1364313 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The square root of 654865440 is about 25590.3388019776. The cubic root of 654865440 is about 868.3950858448.

The spelling of 654865440 in words is "six hundred fifty-four million, eight hundred sixty-five thousand, four hundred forty".