40820355 has 32 divisors (see below), whose sum is σ = 73485120. Its totient is φ = 21765024.

The previous prime is 40820333. The next prime is 40820363. The reversal of 40820355 is 55302804.

40820355 is a `hidden beast` number, since 408 + 203 + 55 = 666.

It is not a de Polignac number, because 40820355 - 2⁶ = 40820291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9069 + ... + 12801.

It is an arithmetic number, because the mean of its divisors is an integer number (2296410).

Almost surely, 2^40820355 is an apocalyptic number.

40820355 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40820355 is a deficient number, since it is larger than the sum of its proper divisors (32664765).

40820355 is an frugal number, since it uses more digits than its factorization.

40820355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759 (or 3741 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 40820355 is about 6389.0809198194. The cubic root of 40820355 is about 344.3173647484.

The spelling of 40820355 in words is "forty million, eight hundred twenty thousand, three hundred fifty-five".