40784428 has 48 divisors (see below), whose sum is σ = 80015040. Its totient is φ = 18089984.

The previous prime is 40784423. The next prime is 40784467. The reversal of 40784428 is 82448704.

It is not an unprimeable number, because it can be changed into a prime (40784423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139050 + ... + 139342.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^40784428 is an apocalyptic number.

It is an amenable number.

40784428 is a deficient number, since it is larger than the sum of its proper divisors (39230612).

40784428 is a wasteful number, since it uses less digits than its factorization.

40784428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 37.

The square root of 40784428 is about 6386.2687071560. The cubic root of 40784428 is about 344.2163210340.

The spelling of 40784428 in words is "forty million, seven hundred eighty-four thousand, four hundred twenty-eight".