40929021 has 48 divisors (see below), whose sum is σ = 73482240. Its totient is φ = 21422880.

The previous prime is 40929019. The next prime is 40929023. The reversal of 40929021 is 12092904.

It is an interprime number because it is at equal distance from previous prime (40929019) and next prime (40929023).

It is not a de Polignac number, because 40929021 - 2¹ = 40929019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40929023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36556 + ... + 37658.

It is an arithmetic number, because the mean of its divisors is an integer number (1530880).

Almost surely, 2^40929021 is an apocalyptic number.

It is an amenable number.

40929021 is a deficient number, since it is larger than the sum of its proper divisors (32553219).

40929021 is a wasteful number, since it uses less digits than its factorization.

40929021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 40929021 is about 6397.5793078320. The cubic root of 40929021 is about 344.6226245385.

The spelling of 40929021 in words is "forty million, nine hundred twenty-nine thousand, twenty-one".