40780812 has 12 divisors (see below), whose sum is σ = 95155256. Its totient is φ = 13593600.

The previous prime is 40780787. The next prime is 40780849. The reversal of 40780812 is 21808704.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 40780812.

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, 1699189 + ... + 1699212.

Almost surely, 2^40780812 is an apocalyptic number.

It is an amenable number.

40780812 is an abundant number, since it is smaller than the sum of its proper divisors (54374444).

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

40780812 is a wasteful number, since it uses less digits than its factorization.

40780812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398408 (or 3398406 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 40780812 is about 6385.9855934695. The cubic root of 40780812 is about 344.2061478457.

The spelling of 40780812 in words is "forty million, seven hundred eighty thousand, eight hundred twelve".