40684390 has 32 divisors (see below), whose sum is σ = 77215680. Its totient is φ = 15410304.

The previous prime is 40684381. The next prime is 40684411. The reversal of 40684390 is 9348604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14047 + ... + 16693.

It is an arithmetic number, because the mean of its divisors is an integer number (2412990).

Almost surely, 2^40684390 is an apocalyptic number.

40684390 is a deficient number, since it is larger than the sum of its proper divisors (36531290).

40684390 is a wasteful number, since it uses less digits than its factorization.

40684390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40684390 is about 6378.4316254076. The cubic root of 40684390 is about 343.9346538487.

The spelling of 40684390 in words is "forty million, six hundred eighty-four thousand, three hundred ninety".