40991590 has 16 divisors (see below), whose sum is σ = 78125472. Its totient is φ = 15432064.

The previous prime is 40991551. The next prime is 40991609. The reversal of 40991590 is 9519904.

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, 120394 + ... + 120733.

It is an arithmetic number, because the mean of its divisors is an integer number (4882842).

Almost surely, 2^40991590 is an apocalyptic number.

40991590 is a deficient number, since it is larger than the sum of its proper divisors (37133882).

40991590 is a wasteful number, since it uses less digits than its factorization.

40991590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241151.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 40991590 is about 6402.4674930842. The cubic root of 40991590 is about 344.7981455911.

The spelling of 40991590 in words is "forty million, nine hundred ninety-one thousand, five hundred ninety".