40722818 has 4 divisors (see below), whose sum is σ = 61084230. Its totient is φ = 20361408.

The previous prime is 40722767. The next prime is 40722823. The reversal of 40722818 is 81822704.

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

It can be written as a sum of positive squares in only one way, i.e., 39025009 + 1697809 = 6247^2 + 1303^2 .

It is a super-2 number, since 2×40722818² = 3316695811722248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180703 + ... + 10180706.

Almost surely, 2^40722818 is an apocalyptic number.

40722818 is a deficient number, since it is larger than the sum of its proper divisors (20361412).

40722818 is a wasteful number, since it uses less digits than its factorization.

40722818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20361411.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 40722818 is about 6381.4432536849. The cubic root of 40722818 is about 344.0429063572.

The spelling of 40722818 in words is "forty million, seven hundred twenty-two thousand, eight hundred eighteen".