40537540 has 12 divisors (see below), whose sum is σ = 85128876. Its totient is φ = 16215008.

The previous prime is 40537529. The next prime is 40537559. The reversal of 40537540 is 4573504.

It can be written as a sum of positive squares in 2 ways, for example, as 23348224 + 17189316 = 4832^2 + 4146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40537499 and 40537508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1013419 + ... + 1013458.

It is an arithmetic number, because the mean of its divisors is an integer number (7094073).

Almost surely, 2^40537540 is an apocalyptic number.

It is an amenable number.

40537540 is an abundant number, since it is smaller than the sum of its proper divisors (44591336).

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

40537540 is a wasteful number, since it uses less digits than its factorization.

40537540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026886 (or 2026884 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 40537540 is about 6366.9097684827. The cubic root of 40537540 is about 343.5203451171.

The spelling of 40537540 in words is "forty million, five hundred thirty-seven thousand, five hundred forty".