40032157 has 4 divisors (see below), whose sum is σ = 43671456. Its totient is φ = 36392860.

The previous prime is 40032137. The next prime is 40032169. The reversal of 40032157 is 75123004.

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 40032157 - 2¹⁹ = 39507869 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 (40032137) 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, 1819633 + ... + 1819654.

It is an arithmetic number, because the mean of its divisors is an integer number (10917864).

Almost surely, 2^40032157 is an apocalyptic number.

It is an amenable number.

40032157 is a deficient number, since it is larger than the sum of its proper divisors (3639299).

40032157 is a wasteful number, since it uses less digits than its factorization.

40032157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3639298.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 40032157 is about 6327.0970436686. The cubic root of 40032157 is about 342.0868109483.

The spelling of 40032157 in words is "forty million, thirty-two thousand, one hundred fifty-seven".