155300400 has 180 divisors, whose sum is σ = 544195080. Its totient is φ = 41011200.

The previous prime is 155300399. The next prime is 155300407. The reversal of 155300400 is 4003551.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (155300407) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 644280 + ... + 644520.

It is an arithmetic number, because the mean of its divisors is an integer number (3023306).

Almost surely, 2^155300400 is an apocalyptic number.

155300400 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 155300400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272097540).

155300400 is an abundant number, since it is smaller than the sum of its proper divisors (388894680).

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

155300400 is a wasteful number, since it uses less digits than its factorization.

155300400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 155300400 is about 12461.9581125921. The cubic root of 155300400 is about 537.5153339775.

Adding to 155300400 its reverse (4003551), we get a palindrome (159303951).

The spelling of 155300400 in words is "one hundred fifty-five million, three hundred thousand, four hundred".