40451644 has 12 divisors (see below), whose sum is σ = 71440600. Its totient is φ = 20040048.

The previous prime is 40451633. The next prime is 40451647. The reversal of 40451644 is 44615404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40451647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45954 + ... + 46825.

Almost surely, 2^40451644 is an apocalyptic number.

It is an amenable number.

40451644 is a deficient number, since it is larger than the sum of its proper divisors (30988956).

40451644 is a wasteful number, since it uses less digits than its factorization.

40451644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92892 (or 92890 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 40451644 is about 6360.1606897939. The cubic root of 40451644 is about 343.2775422798.

The spelling of 40451644 in words is "forty million, four hundred fifty-one thousand, six hundred forty-four".