40494157 has 4 divisors (see below), whose sum is σ = 44175456. Its totient is φ = 36812860.

The previous prime is 40494151. The next prime is 40494161. The reversal of 40494157 is 75149404.

40494157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40494157 - 2¹⁵ = 40461389 is a prime.

It is a super-2 number, since 2×40494157² = 3279553502281298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40494151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1840633 + ... + 1840654.

It is an arithmetic number, because the mean of its divisors is an integer number (11043864).

Almost surely, 2^40494157 is an apocalyptic number.

It is an amenable number.

40494157 is a deficient number, since it is larger than the sum of its proper divisors (3681299).

40494157 is a wasteful number, since it uses less digits than its factorization.

40494157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681298.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 40494157 is about 6363.5019446842. The cubic root of 40494157 is about 343.3977569956.

The spelling of 40494157 in words is "forty million, four hundred ninety-four thousand, one hundred fifty-seven".