40251393 has 96 divisors (see below), whose sum is σ = 78624000. Its totient is φ = 19643904.

The previous prime is 40251377. The next prime is 40251401. The reversal of 40251393 is 39315204.

It is not a de Polignac number, because 40251393 - 2⁴ = 40251377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40251313) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 682198 + ... + 682256.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^40251393 is an apocalyptic number.

It is an amenable number.

40251393 is a deficient number, since it is larger than the sum of its proper divisors (38372607).

40251393 is a wasteful number, since it uses less digits than its factorization.

40251393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 40251393 is about 6344.3985530545. The cubic root of 40251393 is about 342.7101535842.

Adding to 40251393 its reverse (39315204), we get a palindrome (79566597).

The spelling of 40251393 in words is "forty million, two hundred fifty-one thousand, three hundred ninety-three".