40978623 has 16 divisors (see below), whose sum is σ = 63301376. Its totient is φ = 23094720.

The previous prime is 40978601. The next prime is 40978633. The reversal of 40978623 is 32687904.

It is not a de Polignac number, because 40978623 - 2⁸ = 40978367 is a prime.

It is a super-2 number, since 2×40978623² = 3358495085952258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978633) 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, 11833 + ... + 14898.

It is an arithmetic number, because the mean of its divisors is an integer number (3956336).

Almost surely, 2^40978623 is an apocalyptic number.

40978623 is a deficient number, since it is larger than the sum of its proper divisors (22322753).

40978623 is a wasteful number, since it uses less digits than its factorization.

40978623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26814.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 40978623 is about 6401.4547565378. The cubic root of 40978623 is about 344.7617847255.

It can be divided in two parts, 4097 and 8623, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 40978623 in words is "forty million, nine hundred seventy-eight thousand, six hundred twenty-three".