40721402 has 8 divisors (see below), whose sum is σ = 61492500. Its totient is φ = 20223904.

The previous prime is 40721399. The next prime is 40721441. The reversal of 40721402 is 20412704.

It can be written as a sum of positive squares in 2 ways, for example, as 40462321 + 259081 = 6361^2 + 509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68027 + ... + 68622.

Almost surely, 2^40721402 is an apocalyptic number.

40721402 is a deficient number, since it is larger than the sum of its proper divisors (20771098).

40721402 is a wasteful number, since it uses less digits than its factorization.

40721402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136800.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40721402 is about 6381.3323060314. The cubic root of 40721402 is about 344.0389186633.

The spelling of 40721402 in words is "forty million, seven hundred twenty-one thousand, four hundred two".