40821790 has 16 divisors (see below), whose sum is σ = 73724112. Its totient is φ = 16274304.

The previous prime is 40821787. The next prime is 40821797. The reversal of 40821790 is 9712804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40821797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3579 + ... + 9718.

It is an arithmetic number, because the mean of its divisors is an integer number (4607757).

Almost surely, 2^40821790 is an apocalyptic number.

40821790 is a deficient number, since it is larger than the sum of its proper divisors (32902322).

40821790 is a wasteful number, since it uses less digits than its factorization.

40821790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40821790 is about 6389.1932198048. The cubic root of 40821790 is about 344.3213994155.

The spelling of 40821790 in words is "forty million, eight hundred twenty-one thousand, seven hundred ninety".