40454440 has 32 divisors (see below), whose sum is σ = 98025480. Its totient is φ = 14936832.

The previous prime is 40454437. The next prime is 40454497. The reversal of 40454440 is 4445404.

It can be written as a sum of positive squares in 4 ways, for example, as 30980356 + 9474084 = 5566^2 + 3078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38379 + ... + 39418.

Almost surely, 2^40454440 is an apocalyptic number.

40454440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40454440 is an abundant number, since it is smaller than the sum of its proper divisors (57571040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40454440 is a wasteful number, since it uses less digits than its factorization.

40454440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77821 (or 77817 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 40454440 is about 6360.3804917631. The cubic root of 40454440 is about 343.2854511623.

Adding to 40454440 its reverse (4445404), we get a palindrome (44899844).

The spelling of 40454440 in words is "forty million, four hundred fifty-four thousand, four hundred forty".