40123870 has 16 divisors (see below), whose sum is σ = 73036080. Its totient is φ = 15868864.

The previous prime is 40123861. The next prime is 40123901. The reversal of 40123870 is 7832104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21652 + ... + 23431.

It is an arithmetic number, because the mean of its divisors is an integer number (4564755).

Almost surely, 2^40123870 is an apocalyptic number.

40123870 is a deficient number, since it is larger than the sum of its proper divisors (32912210).

40123870 is a wasteful number, since it uses less digits than its factorization.

40123870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45179.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40123870 is about 6334.3405339467. The cubic root of 40123870 is about 342.3478500856.

Adding to 40123870 its reverse (7832104), we get a palindrome (47955974).

The spelling of 40123870 in words is "forty million, one hundred twenty-three thousand, eight hundred seventy".