40453821 has 12 divisors (see below), whose sum is σ = 58762080. Its totient is φ = 26817480.

The previous prime is 40453807. The next prime is 40453823. The reversal of 40453821 is 12835404.

It is not a de Polignac number, because 40453821 - 2⁵ = 40453789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40453823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10945 + ... + 14166.

It is an arithmetic number, because the mean of its divisors is an integer number (4896840).

Almost surely, 2^40453821 is an apocalyptic number.

It is an amenable number.

40453821 is a deficient number, since it is larger than the sum of its proper divisors (18308259).

40453821 is a wasteful number, since it uses less digits than its factorization.

40453821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25296 (or 25293 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40453821 is about 6360.3318309661. The cubic root of 40453821 is about 343.2837002644.

The spelling of 40453821 in words is "forty million, four hundred fifty-three thousand, eight hundred twenty-one".