40301990 has 8 divisors (see below), whose sum is σ = 72543600. Its totient is φ = 16120792.

The previous prime is 40301981. The next prime is 40301993. The reversal of 40301990 is 9910304.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40301993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015090 + ... + 2015109.

It is an arithmetic number, because the mean of its divisors is an integer number (9067950).

Almost surely, 2^40301990 is an apocalyptic number.

40301990 is a deficient number, since it is larger than the sum of its proper divisors (32241610).

40301990 is a wasteful number, since it uses less digits than its factorization.

40301990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030206.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 40301990 is about 6348.3848339558. The cubic root of 40301990 is about 342.8536918469.

The spelling of 40301990 in words is "forty million, three hundred one thousand, nine hundred ninety".