1523380728 has 32 divisors (see below), whose sum is σ = 3811829760. Its totient is φ = 507343200.

The previous prime is 1523380723. The next prime is 1523380751. The reversal of 1523380728 is 8270833251.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523380723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51 + ... + 55197.

It is an arithmetic number, because the mean of its divisors is an integer number (119119680).

Almost surely, 2^1523380728 is an apocalyptic number.

It is an amenable number.

1523380728 is an abundant number, since it is smaller than the sum of its proper divisors (2288449032).

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

1523380728 is a wasteful number, since it uses less digits than its factorization.

1523380728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56307 (or 56303 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1523380728 is about 39030.5102195705. The cubic root of 1523380728 is about 1150.6312169246.

The spelling of 1523380728 in words is "one billion, five hundred twenty-three million, three hundred eighty thousand, seven hundred twenty-eight".