155400000 has 336 divisors, whose sum is σ = 603211392. Its totient is φ = 34560000.

The previous prime is 155399957. The next prime is 155400017. The reversal of 155400000 is 4551.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4199982 + ... + 4200018.

It is an arithmetic number, because the mean of its divisors is an integer number (1795272).

Almost surely, 2^155400000 is an apocalyptic number.

155400000 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 155400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301605696).

155400000 is an abundant number, since it is smaller than the sum of its proper divisors (447811392).

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

155400000 is an frugal number, since it uses more digits than its factorization.

155400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 155400000 is about 12465.9536337979. The cubic root of 155400000 is about 537.6302190355.

Adding to 155400000 its reverse (4551), we get a palindrome (155404551).

It can be divided in two parts, 15 and 5400000, that multiplied together give a square (81000000 = 9000²).

The spelling of 155400000 in words is "one hundred fifty-five million, four hundred thousand".