427308578640 has 120 divisors (see below), whose sum is σ = 1445519755368. Its totient is φ = 113117184000.

The previous prime is 427308578639. The next prime is 427308578651. The reversal of 427308578640 is 46875803724.

427308578640 is a `hidden beast` number, since 4 + 2 + 7 + 3 + 0 + 8 + 578 + 64 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 36928540224 + 390380038416 = 192168^2 + 624804^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

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, 2067361 + ... + 2264640.

Almost surely, 2^427308578640 is an apocalyptic number.

427308578640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

427308578640 is an abundant number, since it is smaller than the sum of its proper divisors (1018211176728).

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

427308578640 is a wasteful number, since it uses less digits than its factorization.

427308578640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332157 (or 4332148 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 54.

The spelling of 427308578640 in words is "four hundred twenty-seven billion, three hundred eight million, five hundred seventy-eight thousand, six hundred forty".