40757491 has 4 divisors (see below), whose sum is σ = 40793184. Its totient is φ = 40721800.

The previous prime is 40757473. The next prime is 40757531. The reversal of 40757491 is 19475704.

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

It is a cyclic number.

It is not a de Polignac number, because 40757491 - 2⁵ = 40757459 is a prime.

It is a super-2 number, since 2×40757491² = 3322346145230162, which contains 22 as substring.

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 40757491.

It is not an unprimeable number, because it can be changed into a prime (40757401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16075 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (10198296).

Almost surely, 2^40757491 is an apocalyptic number.

40757491 is a deficient number, since it is larger than the sum of its proper divisors (35693).

40757491 is a wasteful number, since it uses less digits than its factorization.

40757491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35692.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 40757491 is about 6384.1593808426. The cubic root of 40757491 is about 344.1405225199.

The spelling of 40757491 in words is "forty million, seven hundred fifty-seven thousand, four hundred ninety-one".