55007400 has 144 divisors (see below), whose sum is σ = 198469440. Its totient is φ = 12566400.

The previous prime is 55007399. The next prime is 55007431. The reversal of 55007400 is 470055.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28465 + ... + 30335.

It is an arithmetic number, because the mean of its divisors is an integer number (1378260).

Almost surely, 2^55007400 is an apocalyptic number.

55007400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55007400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99234720).

55007400 is an abundant number, since it is smaller than the sum of its proper divisors (143462040).

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

55007400 is a wasteful number, since it uses less digits than its factorization.

55007400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 55007400 is about 7416.6973782136. The cubic root of 55007400 is about 380.3123009769.

Adding to 55007400 its reverse (470055), we get a palindrome (55477455).

The spelling of 55007400 in words is "fifty-five million, seven thousand, four hundred".