40219816 has 64 divisors (see below), whose sum is σ = 93905280. Its totient is φ = 15724800.

The previous prime is 40219813. The next prime is 40219831. The reversal of 40219816 is 61891204.

It is a happy number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (40219813) 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, 73255 + ... + 73801.

It is an arithmetic number, because the mean of its divisors is an integer number (1467270).

Almost surely, 2^40219816 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 40219816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46952640).

40219816 is an abundant number, since it is smaller than the sum of its proper divisors (53685464).

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

40219816 is a wasteful number, since it uses less digits than its factorization.

40219816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 40219816 is about 6341.9094916279. The cubic root of 40219816 is about 342.6205120520.

The spelling of 40219816 in words is "forty million, two hundred nineteen thousand, eight hundred sixteen".