40655990 has 8 divisors (see below), whose sum is σ = 73180800. Its totient is φ = 16262392.

The previous prime is 40655957. The next prime is 40656013. The reversal of 40655990 is 9955604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 2032790 + ... + 2032809.

It is an arithmetic number, because the mean of its divisors is an integer number (9147600).

Almost surely, 2^40655990 is an apocalyptic number.

40655990 is a deficient number, since it is larger than the sum of its proper divisors (32524810).

40655990 is a wasteful number, since it uses less digits than its factorization.

40655990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065606.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 40655990 is about 6376.2049841579. The cubic root of 40655990 is about 343.8546066212.

The spelling of 40655990 in words is "forty million, six hundred fifty-five thousand, nine hundred ninety".