55049904 has 120 divisors (see below), whose sum is σ = 189661472. Its totient is φ = 14515200.

The previous prime is 55049899. The next prime is 55049909. The reversal of 55049904 is 40994055.

It is an interprime number because it is at equal distance from previous prime (55049899) and next prime (55049909).

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

It is not an unprimeable number, because it can be changed into a prime (55049909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11004 + ... + 15204.

Almost surely, 2^55049904 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 55049904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94830736).

55049904 is an abundant number, since it is smaller than the sum of its proper divisors (134611568).

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

55049904 is a wasteful number, since it uses less digits than its factorization.

55049904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235 (or 4226 counting only the distinct ones).

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

The square root of 55049904 is about 7419.5622512383. The cubic root of 55049904 is about 380.4102310271.

The spelling of 55049904 in words is "fifty-five million, forty-nine thousand, nine hundred four".