40101810 has 128 divisors (see below), whose sum is σ = 119439360. Its totient is φ = 8408064.

The previous prime is 40101797. The next prime is 40101823. The reversal of 40101810 is 1810104.

It is an interprime number because it is at equal distance from previous prime (40101797) and next prime (40101823).

It is a super-2 number, since 2×40101810² = 3216310330552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40101810.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167671 + ... + 167909.

It is an arithmetic number, because the mean of its divisors is an integer number (933120).

Almost surely, 2^40101810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40101810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59719680).

40101810 is an abundant number, since it is smaller than the sum of its proper divisors (79337550).

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

40101810 is a wasteful number, since it uses less digits than its factorization.

40101810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 40101810 is about 6332.5989925148. The cubic root of 40101810 is about 342.2850979296.

Adding to 40101810 its reverse (1810104), we get a palindrome (41911914).

The spelling of 40101810 in words is "forty million, one hundred one thousand, eight hundred ten".