55619460 has 240 divisors, whose sum is σ = 199214400. Its totient is φ = 12877056.

The previous prime is 55619449. The next prime is 55619489. The reversal of 55619460 is 6491655.

55619460 is a `hidden beast` number, since 5 + 561 + 94 + 6 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 400071 + ... + 400209.

It is an arithmetic number, because the mean of its divisors is an integer number (830060).

Almost surely, 2^55619460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55619460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99607200).

55619460 is an abundant number, since it is smaller than the sum of its proper divisors (143594940).

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

55619460 is a wasteful number, since it uses less digits than its factorization.

55619460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55619460 is about 7457.8455333964. The cubic root of 55619460 is about 381.7176627786.

The spelling of 55619460 in words is "fifty-five million, six hundred nineteen thousand, four hundred sixty".