40457287 has 4 divisors (see below), whose sum is σ = 43569400. Its totient is φ = 37345176.

The previous prime is 40457273. The next prime is 40457293. The reversal of 40457287 is 78275404.

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 40457287 - 2⁷ = 40457159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40457227) 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, 1556037 + ... + 1556062.

It is an arithmetic number, because the mean of its divisors is an integer number (10892350).

Almost surely, 2^40457287 is an apocalyptic number.

40457287 is a deficient number, since it is larger than the sum of its proper divisors (3112113).

40457287 is a wasteful number, since it uses less digits than its factorization.

40457287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112112.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 40457287 is about 6360.6042951908. The cubic root of 40457287 is about 343.2935039311.

The spelling of 40457287 in words is "forty million, four hundred fifty-seven thousand, two hundred eighty-seven".