40345988 has 12 divisors (see below), whose sum is σ = 70686672. Its totient is φ = 20149800.

The previous prime is 40345967. The next prime is 40345999. The reversal of 40345988 is 88954304.

It is a super-2 number, since 2×40345988² = 3255597495392288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538 + ... + 9113.

It is an arithmetic number, because the mean of its divisors is an integer number (5890556).

Almost surely, 2^40345988 is an apocalyptic number.

It is an amenable number.

40345988 is a deficient number, since it is larger than the sum of its proper divisors (30340684).

40345988 is a wasteful number, since it uses less digits than its factorization.

40345988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11602 (or 11600 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 40345988 is about 6351.8491795697. The cubic root of 40345988 is about 342.9784118308.

The spelling of 40345988 in words is "forty million, three hundred forty-five thousand, nine hundred eighty-eight".