40423647 has 16 divisors (see below), whose sum is σ = 60388992. Its totient is φ = 23836320.

The previous prime is 40423639. The next prime is 40423661. The reversal of 40423647 is 74632404.

It is not a de Polignac number, because 40423647 - 2³ = 40423639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15333 + ... + 17774.

It is an arithmetic number, because the mean of its divisors is an integer number (3774312).

Almost surely, 2^40423647 is an apocalyptic number.

40423647 is a deficient number, since it is larger than the sum of its proper divisors (19965345).

40423647 is a wasteful number, since it uses less digits than its factorization.

40423647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33158.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 40423647 is about 6357.9593424306. The cubic root of 40423647 is about 343.1983286931.

The spelling of 40423647 in words is "forty million, four hundred twenty-three thousand, six hundred forty-seven".