40263657 has 8 divisors (see below), whose sum is σ = 61354176. Its totient is φ = 23007792.

The previous prime is 40263649. The next prime is 40263677. The reversal of 40263657 is 75636204.

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

It is not a de Polignac number, because 40263657 - 2³ = 40263649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40263607) 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, 958638 + ... + 958679.

It is an arithmetic number, because the mean of its divisors is an integer number (7669272).

Almost surely, 2^40263657 is an apocalyptic number.

It is an amenable number.

40263657 is a deficient number, since it is larger than the sum of its proper divisors (21090519).

40263657 is a wasteful number, since it uses less digits than its factorization.

40263657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917327.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 40263657 is about 6345.3650013218. The cubic root of 40263657 is about 342.7449562765.

The spelling of 40263657 in words is "forty million, two hundred sixty-three thousand, six hundred fifty-seven".