15428740 has 12 divisors (see below), whose sum is σ = 32400396. Its totient is φ = 6171488.

The previous prime is 15428729. The next prime is 15428747. The reversal of 15428740 is 4782451.

15428740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 9048064 = 2526^2 + 3008^2 .

It is not an unprimeable number, because it can be changed into a prime (15428747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385699 + ... + 385738.

It is an arithmetic number, because the mean of its divisors is an integer number (2700033).

Almost surely, 2^15428740 is an apocalyptic number.

15428740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15428740 is an abundant number, since it is smaller than the sum of its proper divisors (16971656).

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

15428740 is a wasteful number, since it uses less digits than its factorization.

15428740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771446 (or 771444 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 15428740 is about 3927.9434822818. The cubic root of 15428740 is about 248.9488666689.

The spelling of 15428740 in words is "fifteen million, four hundred twenty-eight thousand, seven hundred forty".