40123650 has 144 divisors (see below), whose sum is σ = 119081664. Its totient is φ = 8910720.

The previous prime is 40123639. The next prime is 40123669. The reversal of 40123650 is 5632104.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389499 + ... + 389601.

It is an arithmetic number, because the mean of its divisors is an integer number (826956).

Almost surely, 2^40123650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40123650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59540832).

40123650 is an abundant number, since it is smaller than the sum of its proper divisors (78958014).

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

40123650 is a wasteful number, since it uses less digits than its factorization.

40123650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 40123650 is about 6334.3231682635. The cubic root of 40123650 is about 342.3472243844.

Adding to 40123650 its reverse (5632104), we get a palindrome (45755754).

The spelling of 40123650 in words is "forty million, one hundred twenty-three thousand, six hundred fifty".