654409878 has 16 divisors (see below), whose sum is σ = 1309271040. Its totient is φ = 218061416.

The previous prime is 654409841. The next prime is 654409909. The reversal of 654409878 is 878904456.

It is a self number, because there is not a number n which added to its sum of digits gives 654409878.

It is a congruent number.

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, 1783 + ... + 36221.

It is an arithmetic number, because the mean of its divisors is an integer number (81829440).

Almost surely, 2^654409878 is an apocalyptic number.

654409878 is an abundant number, since it is smaller than the sum of its proper divisors (654861162).

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

654409878 is a wasteful number, since it uses less digits than its factorization.

654409878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37611.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 654409878 is about 25581.4361989314. The cubic root of 654409878 is about 868.1936706383.

The spelling of 654409878 in words is "six hundred fifty-four million, four hundred nine thousand, eight hundred seventy-eight".