1528745997 has 16 divisors (see below), whose sum is σ = 2106249728. Its totient is φ = 985271040.

The previous prime is 1528745993. The next prime is 1528746007. The reversal of 1528745997 is 7995478251.

It is not a de Polignac number, because 1528745997 - 2² = 1528745993 is a prime.

It is a super-3 number, since 3×1528745997³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528745993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88113 + ... + 104025.

It is an arithmetic number, because the mean of its divisors is an integer number (131640608).

Almost surely, 2^1528745997 is an apocalyptic number.

It is an amenable number.

1528745997 is a deficient number, since it is larger than the sum of its proper divisors (577503731).

1528745997 is a wasteful number, since it uses less digits than its factorization.

1528745997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16980.

The product of its digits is 6350400, while the sum is 57.

The square root of 1528745997 is about 39099.1815387484. The cubic root of 1528745997 is about 1151.9804556086.

The spelling of 1528745997 in words is "one billion, five hundred twenty-eight million, seven hundred forty-five thousand, nine hundred ninety-seven".