155544400 has 240 divisors, whose sum is σ = 448364160. Its totient is φ = 51251200.

The previous prime is 155544383. The next prime is 155544401. The reversal of 155544400 is 4445551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155544401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2934774 + ... + 2934826.

It is an arithmetic number, because the mean of its divisors is an integer number (1868184).

Almost surely, 2^155544400 is an apocalyptic number.

155544400 is a gapful number since it is divisible by the number (10) 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 155544400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224182080).

155544400 is an abundant number, since it is smaller than the sum of its proper divisors (292819760).

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

155544400 is a wasteful number, since it uses less digits than its factorization.

155544400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 155544400 is about 12471.7440640834. The cubic root of 155544400 is about 537.7966921583.

Adding to 155544400 its reverse (4445551), we get a palindrome (159989951).

The spelling of 155544400 in words is "one hundred fifty-five million, five hundred forty-four thousand, four hundred".