40539456 has 42 divisors (see below), whose sum is σ = 116200682. Its totient is φ = 13512960.

The previous prime is 40539439. The next prime is 40539463. The reversal of 40539456 is 65493504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 9000000 = 5616^2 + 3000^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 40539456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34615 + ... + 35766.

Almost surely, 2^40539456 is an apocalyptic number.

It is an amenable number.

40539456 is an abundant number, since it is smaller than the sum of its proper divisors (75661226).

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

40539456 is a wasteful number, since it uses less digits than its factorization.

40539456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70399 (or 70386 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 40539456 is about 6367.0602321637. The cubic root of 40539456 is about 343.5257571756.

It can be divided in two parts, 405394 and 56, that added together give a triangular number (405450 = T₉₀₀).

The spelling of 40539456 in words is "forty million, five hundred thirty-nine thousand, four hundred fifty-six".