15478440120 has 1024 divisors, whose sum is σ = 64795852800. Its totient is φ = 3234816000.

The previous prime is 15478440119. The next prime is 15478440121. The reversal of 15478440120 is 2104487451.

It is a happy number.

15478440120 is a `hidden beast` number, since 154 + 7 + 84 + 401 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (15478440119) and next prime (15478440121).

It is a super-2 number, since 2×15478440120² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15478440121) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 253744890 + ... + 253744950.

It is an arithmetic number, because the mean of its divisors is an integer number (63277200).

Almost surely, 2^15478440120 is an apocalyptic number.

15478440120 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 15478440120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32397926400).

15478440120 is an abundant number, since it is smaller than the sum of its proper divisors (49317412680).

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

15478440120 is a wasteful number, since it uses less digits than its factorization.

15478440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The spelling of 15478440120 in words is "fifteen billion, four hundred seventy-eight million, four hundred forty thousand, one hundred twenty".