40528557 has 6 divisors (see below), whose sum is σ = 58541262. Its totient is φ = 27019032.

The previous prime is 40528549. The next prime is 40528597. The reversal of 40528557 is 75582504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40525956 + 2601 = 6366^2 + 51^2 .

It is not a de Polignac number, because 40528557 - 2³ = 40528549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40528547) 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, 2251578 + ... + 2251595.

It is an arithmetic number, because the mean of its divisors is an integer number (9756877).

Almost surely, 2^40528557 is an apocalyptic number.

It is an amenable number.

40528557 is a deficient number, since it is larger than the sum of its proper divisors (18012705).

40528557 is a wasteful number, since it uses less digits than its factorization.

40528557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4503179 (or 4503176 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 40528557 is about 6366.2042851294. The cubic root of 40528557 is about 343.4949688755.

The spelling of 40528557 in words is "forty million, five hundred twenty-eight thousand, five hundred fifty-seven".