40388499 has 12 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 26853072.

The previous prime is 40388489. The next prime is 40388507. The reversal of 40388499 is 99488304.

It is a happy number.

It is not a de Polignac number, because 40388499 - 2¹⁹ = 39864211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2412 + ... + 9305.

It is an arithmetic number, because the mean of its divisors is an integer number (4874688).

Almost surely, 2^40388499 is an apocalyptic number.

40388499 is a deficient number, since it is larger than the sum of its proper divisors (18107757).

40388499 is a wasteful number, since it uses less digits than its factorization.

40388499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12106 (or 12103 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 40388499 is about 6355.1946469011. The cubic root of 40388499 is about 343.0988305561.

The spelling of 40388499 in words is "forty million, three hundred eighty-eight thousand, four hundred ninety-nine".