55604340 has 288 divisors, whose sum is σ = 203777280. Its totient is φ = 12545280.

The previous prime is 55604333. The next prime is 55604347. The reversal of 55604340 is 4340655.

55604340 is a `hidden beast` number, since 55 + 604 + 3 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55604333) and next prime (55604347).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55604347) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1502802 + ... + 1502838.

It is an arithmetic number, because the mean of its divisors is an integer number (707560).

Almost surely, 2^55604340 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 55604340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101888640).

55604340 is an abundant number, since it is smaller than the sum of its proper divisors (148172940).

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

55604340 is a wasteful number, since it uses less digits than its factorization.

55604340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 55604340 is about 7456.8317669101. The cubic root of 55604340 is about 381.6830700052.

Adding to 55604340 its reverse (4340655), we get a palindrome (59944995).

The spelling of 55604340 in words is "fifty-five million, six hundred four thousand, three hundred forty".