15428550 has 48 divisors (see below), whose sum is σ = 38814480. Its totient is φ = 4055040.

The previous prime is 15428527. The next prime is 15428557. The reversal of 15428550 is 5582451.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15428557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10246 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (808635).

Almost surely, 2^15428550 is an apocalyptic number.

15428550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15428550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19407240).

15428550 is an abundant number, since it is smaller than the sum of its proper divisors (23385930).

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

15428550 is a wasteful number, since it uses less digits than its factorization.

15428550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 15428550 is about 3927.9192965233. The cubic root of 15428550 is about 248.9478447561.

The spelling of 15428550 in words is "fifteen million, four hundred twenty-eight thousand, five hundred fifty".