1528673640 has 64 divisors (see below), whose sum is σ = 4938796800. Its totient is φ = 376288512.

The previous prime is 1528673639. The next prime is 1528673659. The reversal of 1528673640 is 463768251.

It is a junction number, because it is equal to n+sod(n) for n = 1528673592 and 1528673601.

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 15 ways as a sum of consecutive naturals, for example, 488400 + ... + 491519.

It is an arithmetic number, because the mean of its divisors is an integer number (77168700).

Almost surely, 2^1528673640 is an apocalyptic number.

1528673640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1528673640 is an abundant number, since it is smaller than the sum of its proper divisors (3410123160).

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

1528673640 is a wasteful number, since it uses less digits than its factorization.

1528673640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979946 (or 979942 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1528673640 is about 39098.2562271005. The cubic root of 1528673640 is about 1151.9622805455.

The spelling of 1528673640 in words is "one billion, five hundred twenty-eight million, six hundred seventy-three thousand, six hundred forty".