1528979380 has 96 divisors (see below), whose sum is σ = 3406411008. Its totient is φ = 575769600.

The previous prime is 1528979377. The next prime is 1528979393. The reversal of 1528979380 is 839798251.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3631570 + ... + 3631990.

It is an arithmetic number, because the mean of its divisors is an integer number (35483448).

Almost surely, 2^1528979380 is an apocalyptic number.

1528979380 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 1528979380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703205504).

1528979380 is an abundant number, since it is smaller than the sum of its proper divisors (1877431628).

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

1528979380 is a wasteful number, since it uses less digits than its factorization.

1528979380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 615 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 1528979380 is about 39102.1659246646. The cubic root of 1528979380 is about 1152.0390742357.

The spelling of 1528979380 in words is "one billion, five hundred twenty-eight million, nine hundred seventy-nine thousand, three hundred eighty".