40720346 has 8 divisors (see below), whose sum is σ = 61941024. Its totient is φ = 20073340.

The previous prime is 40720331. The next prime is 40720357. The reversal of 40720346 is 64302704.

It is a happy number.

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

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, 143240 + ... + 143523.

It is an arithmetic number, because the mean of its divisors is an integer number (7742628).

Almost surely, 2^40720346 is an apocalyptic number.

40720346 is a deficient number, since it is larger than the sum of its proper divisors (21220678).

40720346 is a wasteful number, since it uses less digits than its factorization.

40720346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286836.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 40720346 is about 6381.2495641528. The cubic root of 40720346 is about 344.0359447297.

The spelling of 40720346 in words is "forty million, seven hundred twenty thousand, three hundred forty-six".