40447557 has 12 divisors (see below), whose sum is σ = 58618560. Its totient is φ = 26875368.

The previous prime is 40447543. The next prime is 40447601. The reversal of 40447557 is 75574404.

It is not a de Polignac number, because 40447557 - 2¹⁰ = 40446533 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40447507) 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, 4557 + ... + 10082.

It is an arithmetic number, because the mean of its divisors is an integer number (4884880).

Almost surely, 2^40447557 is an apocalyptic number.

It is an amenable number.

40447557 is a deficient number, since it is larger than the sum of its proper divisors (18171003).

40447557 is a wasteful number, since it uses less digits than its factorization.

40447557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14952 (or 14949 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 40447557 is about 6359.8393847644. The cubic root of 40447557 is about 343.2659809651.

It can be divided in two parts, 404 and 47557, that added together give a square (47961 = 219²).

The spelling of 40447557 in words is "forty million, four hundred forty-seven thousand, five hundred fifty-seven".