40154220 has 144 divisors (see below), whose sum is σ = 131040000. Its totient is φ = 9922176.

The previous prime is 40154203. The next prime is 40154243. The reversal of 40154220 is 2245104.

It is a super-2 number, since 2×40154220² = 3224722767616800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40154193 and 40154202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 201681 + ... + 201879.

It is an arithmetic number, because the mean of its divisors is an integer number (910000).

Almost surely, 2^40154220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40154220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65520000).

40154220 is an abundant number, since it is smaller than the sum of its proper divisors (90885780).

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

40154220 is a wasteful number, since it uses less digits than its factorization.

40154220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40154220 is about 6336.7357527358. The cubic root of 40154220 is about 342.4341465021.

Adding to 40154220 its reverse (2245104), we get a palindrome (42399324).

The spelling of 40154220 in words is "forty million, one hundred fifty-four thousand, two hundred twenty".