40720249 has 8 divisors (see below), whose sum is σ = 42922880. Its totient is φ = 38523600.

The previous prime is 40720247. The next prime is 40720279. The reversal of 40720249 is 94202704.

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

It is a cyclic number.

It is not a de Polignac number, because 40720249 - 2¹ = 40720247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40720243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22519 + ... + 24259.

It is an arithmetic number, because the mean of its divisors is an integer number (5365360).

Almost surely, 2^40720249 is an apocalyptic number.

It is an amenable number.

40720249 is a deficient number, since it is larger than the sum of its proper divisors (2202631).

40720249 is a wasteful number, since it uses less digits than its factorization.

40720249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 40720249 is about 6381.2419637560. The cubic root of 40720249 is about 344.0356715533.

The spelling of 40720249 in words is "forty million, seven hundred twenty thousand, two hundred forty-nine".