40163838 has 32 divisors (see below), whose sum is σ = 94372992. Its totient is φ = 11234400.

The previous prime is 40163813. The next prime is 40163839. The reversal of 40163838 is 83836104.

It is a super-2 number, since 2×40163838² = 3226267765780488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40163799 and 40163808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40163839) 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, 22548 + ... + 24263.

It is an arithmetic number, because the mean of its divisors is an integer number (2949156).

Almost surely, 2^40163838 is an apocalyptic number.

40163838 is an abundant number, since it is smaller than the sum of its proper divisors (54209154).

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

40163838 is a wasteful number, since it uses less digits than its factorization.

40163838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46840.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 40163838 is about 6337.4946153823. The cubic root of 40163838 is about 342.4614850043.

It can be divided in two parts, 40 and 163838, that added together give a triangular number (163878 = T₅₇₂).

The spelling of 40163838 in words is "forty million, one hundred sixty-three thousand, eight hundred thirty-eight".