40153779 has 16 divisors (see below), whose sum is σ = 62987040. Its totient is φ = 25194240.

The previous prime is 40153721. The next prime is 40153781. The reversal of 40153779 is 97735104.

It is a happy number.

40153779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40153779 - 2¹⁷ = 40022707 is a prime.

It is a super-2 number, since 2×40153779² = 3224651935961682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40153079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43282 + ... + 44199.

It is an arithmetic number, because the mean of its divisors is an integer number (3936690).

Almost surely, 2^40153779 is an apocalyptic number.

40153779 is a deficient number, since it is larger than the sum of its proper divisors (22833261).

40153779 is a wasteful number, since it uses less digits than its factorization.

40153779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87507 (or 87501 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 40153779 is about 6336.7009555446. The cubic root of 40153779 is about 342.4328928853.

The spelling of 40153779 in words is "forty million, one hundred fifty-three thousand, seven hundred seventy-nine".