40406553 has 32 divisors (see below), whose sum is σ = 67086720. Its totient is φ = 23820480.

The previous prime is 40406539. The next prime is 40406567. The reversal of 40406553 is 35560404.

40406553 is a `hidden beast` number, since 4 + 0 + 4 + 0 + 655 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (40406539) and next prime (40406567).

It is not a de Polignac number, because 40406553 - 2⁴ = 40406537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40406503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9151 + ... + 12827.

It is an arithmetic number, because the mean of its divisors is an integer number (2096460).

Almost surely, 2^40406553 is an apocalyptic number.

It is an amenable number.

40406553 is a deficient number, since it is larger than the sum of its proper divisors (26680167).

40406553 is a wasteful number, since it uses less digits than its factorization.

40406553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 40406553 is about 6356.6149010303. The cubic root of 40406553 is about 343.1499456318.

Adding to 40406553 its reverse (35560404), we get a palindrome (75966957).

The spelling of 40406553 in words is "forty million, four hundred six thousand, five hundred fifty-three".