40502540 has 72 divisors (see below), whose sum is σ = 96290208. Its totient is φ = 14277120.

The previous prime is 40502537. The next prime is 40502557. The reversal of 40502540 is 4520504.

40502540 = T₁₀₄ + T₁₀₅ + ... + T₆₂₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77480 + ... + 78000.

It is an arithmetic number, because the mean of its divisors is an integer number (1337364).

Almost surely, 2^40502540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40502540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48145104).

40502540 is an abundant number, since it is smaller than the sum of its proper divisors (55787668).

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

40502540 is a wasteful number, since it uses less digits than its factorization.

40502540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40502540 is about 6364.1605887972. The cubic root of 40502540 is about 343.4214518114.

The spelling of 40502540 in words is "forty million, five hundred two thousand, five hundred forty".