40155489 has 12 divisors (see below), whose sum is σ = 63275472. Its totient is φ = 24336600.

The previous prime is 40155487. The next prime is 40155499. The reversal of 40155489 is 98455104.

It is not a de Polignac number, because 40155489 - 2¹ = 40155487 is a prime.

It is a super-2 number, since 2×40155489² = 3224926593658242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40155481) 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, 202707 + ... + 202904.

It is an arithmetic number, because the mean of its divisors is an integer number (5272956).

Almost surely, 2^40155489 is an apocalyptic number.

It is an amenable number.

40155489 is a deficient number, since it is larger than the sum of its proper divisors (23119983).

40155489 is a wasteful number, since it uses less digits than its factorization.

40155489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405628 (or 405625 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 40155489 is about 6336.8358823627. The cubic root of 40155489 is about 342.4377537971.

The spelling of 40155489 in words is "forty million, one hundred fifty-five thousand, four hundred eighty-nine".