40296921 has 16 divisors (see below), whose sum is σ = 63523200. Its totient is φ = 22232448.

The previous prime is 40296911. The next prime is 40296923. The reversal of 40296921 is 12969204.

It is not a de Polignac number, because 40296921 - 2²¹ = 38199769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40296923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32476 + ... + 33693.

It is an arithmetic number, because the mean of its divisors is an integer number (3970200).

Almost surely, 2^40296921 is an apocalyptic number.

It is an amenable number.

40296921 is a deficient number, since it is larger than the sum of its proper divisors (23226279).

40296921 is a wasteful number, since it uses less digits than its factorization.

40296921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66208.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 40296921 is about 6347.9855859950. The cubic root of 40296921 is about 342.8393170544.

The spelling of 40296921 in words is "forty million, two hundred ninety-six thousand, nine hundred twenty-one".