40621705 has 4 divisors (see below), whose sum is σ = 48746052. Its totient is φ = 32497360.

The previous prime is 40621699. The next prime is 40621717. The reversal of 40621705 is 50712604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13778944 + 26842761 = 3712^2 + 5181^2 .

It is not a de Polignac number, because 40621705 - 2³ = 40621697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40621705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4062166 + ... + 4062175.

It is an arithmetic number, because the mean of its divisors is an integer number (12186513).

Almost surely, 2^40621705 is an apocalyptic number.

It is an amenable number.

40621705 is a deficient number, since it is larger than the sum of its proper divisors (8124347).

40621705 is an equidigital number, since it uses as much as digits as its factorization.

40621705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124346.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 40621705 is about 6373.5159056835. The cubic root of 40621705 is about 343.7579224620.

The spelling of 40621705 in words is "forty million, six hundred twenty-one thousand, seven hundred five".