40782780 has 36 divisors (see below), whose sum is σ = 123708312. Its totient is φ = 10875360.

The previous prime is 40782773. The next prime is 40782799. The reversal of 40782780 is 8728704.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113106 + ... + 113465.

It is an arithmetic number, because the mean of its divisors is an integer number (3436342).

Almost surely, 2^40782780 is an apocalyptic number.

It is an amenable number.

40782780 is an abundant number, since it is smaller than the sum of its proper divisors (82925532).

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

40782780 is a wasteful number, since it uses less digits than its factorization.

40782780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226586 (or 226581 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 40782780 is about 6386.1396790236. The cubic root of 40782780 is about 344.2116846555.

The spelling of 40782780 in words is "forty million, seven hundred eighty-two thousand, seven hundred eighty".