11528978 has 8 divisors (see below), whose sum is σ = 17760972. Its totient is φ = 5608656.

The previous prime is 11528977. The next prime is 11528987. The reversal of 11528978 is 87982511.

It can be written as a sum of positive squares in 2 ways, for example, as 9042049 + 2486929 = 3007^2 + 1577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11528977) 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, 77825 + ... + 77972.

Almost surely, 2^11528978 is an apocalyptic number.

11528978 is a deficient number, since it is larger than the sum of its proper divisors (6231994).

11528978 is a wasteful number, since it uses less digits than its factorization.

11528978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155836.

The product of its digits is 40320, while the sum is 41.

The square root of 11528978 is about 3395.4348764186. The cubic root of 11528978 is about 225.9073026789.

It can be divided in two parts, 1152 and 8978, that multiplied together give a square (10342656 = 3216²).

The spelling of 11528978 in words is "eleven million, five hundred twenty-eight thousand, nine hundred seventy-eight".