40073557 has 4 divisors (see below), whose sum is σ = 40090176. Its totient is φ = 40056940.

The previous prime is 40073531. The next prime is 40073587. The reversal of 40073557 is 75537004.

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 40073557 - 2¹¹ = 40071509 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 (40073587) 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, 3919 + ... + 9772.

It is an arithmetic number, because the mean of its divisors is an integer number (10022544).

Almost surely, 2^40073557 is an apocalyptic number.

It is an amenable number.

40073557 is a deficient number, since it is larger than the sum of its proper divisors (16619).

40073557 is a wasteful number, since it uses less digits than its factorization.

40073557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16618.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 40073557 is about 6330.3678408130. The cubic root of 40073557 is about 342.2046954669.

The spelling of 40073557 in words is "forty million, seventy-three thousand, five hundred fifty-seven".