40155479 has 32 divisors (see below), whose sum is σ = 53053056. Its totient is φ = 29491200.

The previous prime is 40155473. The next prime is 40155481. The reversal of 40155479 is 97455104.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40155479 is a prime.

It is a super-2 number, since 2×40155479² = 3224924987438882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40155473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156119 + ... + 156375.

It is an arithmetic number, because the mean of its divisors is an integer number (1657908).

Almost surely, 2^40155479 is an apocalyptic number.

40155479 is a deficient number, since it is larger than the sum of its proper divisors (12897577).

40155479 is a wasteful number, since it uses less digits than its factorization.

40155479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 40155479 is about 6336.8350933254. The cubic root of 40155479 is about 342.4377253712.

The spelling of 40155479 in words is "forty million, one hundred fifty-five thousand, four hundred seventy-nine".