40021528 has 8 divisors (see below), whose sum is σ = 75040380. Its totient is φ = 20010760.

The previous prime is 40021517. The next prime is 40021547. The reversal of 40021528 is 82512004.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 40021499 and 40021508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501338 + ... + 2501353.

Almost surely, 2^40021528 is an apocalyptic number.

It is an amenable number.

40021528 is a deficient number, since it is larger than the sum of its proper divisors (35018852).

40021528 is a wasteful number, since it uses less digits than its factorization.

40021528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002697 (or 5002693 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40021528 is about 6326.2570292393. The cubic root of 40021528 is about 342.0565322687.

The spelling of 40021528 in words is "forty million, twenty-one thousand, five hundred twenty-eight".