40020512 has 48 divisors (see below), whose sum is σ = 91772352. Its totient is φ = 16823040.

The previous prime is 40020503. The next prime is 40020521. The reversal of 40020512 is 21502004.

It is an interprime number because it is at equal distance from previous prime (40020503) and next prime (40020521).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10187 + ... + 13557.

It is an arithmetic number, because the mean of its divisors is an integer number (1911924).

Almost surely, 2^40020512 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 40020512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45886176).

40020512 is an abundant number, since it is smaller than the sum of its proper divisors (51751840).

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

40020512 is a wasteful number, since it uses less digits than its factorization.

40020512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441 (or 3433 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 40020512 is about 6326.1767284830. The cubic root of 40020512 is about 342.0536377234.

Adding to 40020512 its reverse (21502004), we get a palindrome (61522516).

The spelling of 40020512 in words is "forty million, twenty thousand, five hundred twelve".