40423156 has 6 divisors (see below), whose sum is σ = 70740530. Its totient is φ = 20211576.

The previous prime is 40423147. The next prime is 40423181. The reversal of 40423156 is 65132404.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 11971600 = 5334^2 + 3460^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40423156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052891 + ... + 5052898.

Almost surely, 2^40423156 is an apocalyptic number.

It is an amenable number.

40423156 is a deficient number, since it is larger than the sum of its proper divisors (30317374).

40423156 is a wasteful number, since it uses less digits than its factorization.

40423156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105793 (or 10105791 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 40423156 is about 6357.9207292951. The cubic root of 40423156 is about 343.1969391511.

The spelling of 40423156 in words is "forty million, four hundred twenty-three thousand, one hundred fifty-six".