40445460 has 144 divisors (see below), whose sum is σ = 138532800. Its totient is φ = 9789120.

The previous prime is 40445443. The next prime is 40445467. The reversal of 40445460 is 6454404.

It is a super-2 number, since 2×40445460² = 3271670469223200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40445467) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65031 + ... + 65649.

Almost surely, 2^40445460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40445460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69266400).

40445460 is an abundant number, since it is smaller than the sum of its proper divisors (98087340).

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

40445460 is a wasteful number, since it uses less digits than its factorization.

40445460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 40445460 is about 6359.6745199735. The cubic root of 40445460 is about 343.2600486645.

Adding to 40445460 its reverse (6454404), we get a palindrome (46899864).

The spelling of 40445460 in words is "forty million, four hundred forty-five thousand, four hundred sixty".