40299990 has 16 divisors (see below), whose sum is σ = 96720048. Its totient is φ = 10746656.

The previous prime is 40299989. The next prime is 40300019. The reversal of 40299990 is 9999204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671637 + ... + 671696.

It is an arithmetic number, because the mean of its divisors is an integer number (6045003).

Almost surely, 2^40299990 is an apocalyptic number.

40299990 is an abundant number, since it is smaller than the sum of its proper divisors (56420058).

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

40299990 is a wasteful number, since it uses less digits than its factorization.

40299990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343343.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 40299990 is about 6348.2273116202. The cubic root of 40299990 is about 342.8480203426.

The spelling of 40299990 in words is "forty million, two hundred ninety-nine thousand, nine hundred ninety".