40991930 has 128 divisors (see below), whose sum is σ = 98496000. Its totient is φ = 12192768.

The previous prime is 40991927. The next prime is 40991933. The reversal of 40991930 is 3919904.

It is an interprime number because it is at equal distance from previous prime (40991927) and next prime (40991933).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40991933) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1107872 + ... + 1107908.

It is an arithmetic number, because the mean of its divisors is an integer number (769500).

Almost surely, 2^40991930 is an apocalyptic number.

40991930 is an abundant number, since it is smaller than the sum of its proper divisors (57504070).

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

40991930 is a wasteful number, since it uses less digits than its factorization.

40991930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 40991930 is about 6402.4940452920. The cubic root of 40991930 is about 344.7990988846.

The spelling of 40991930 in words is "forty million, nine hundred ninety-one thousand, nine hundred thirty".