40278528 has 60 divisors (see below), whose sum is σ = 116259858. Its totient is φ = 13424640.

The previous prime is 40278527. The next prime is 40278529. The reversal of 40278528 is 82587204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40278527) and next prime (40278529).

It can be written as a sum of positive squares in only one way, i.e., 38340864 + 1937664 = 6192^2 + 1392^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40278492 and 40278501.

It is not an unprimeable number, because it can be changed into a prime (40278527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 238 + ... + 8978.

Almost surely, 2^40278528 is an apocalyptic number.

40278528 is a gapful number since it is divisible by the number (48) 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 40278528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58129929).

40278528 is an abundant number, since it is smaller than the sum of its proper divisors (75981330).

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

40278528 is an equidigital number, since it uses as much as digits as its factorization.

40278528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8765 (or 8746 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 40278528 is about 6346.5366933470. The cubic root of 40278528 is about 342.7871476160.

The spelling of 40278528 in words is "forty million, two hundred seventy-eight thousand, five hundred twenty-eight".