40072266 has 48 divisors (see below), whose sum is σ = 96448320. Its totient is φ = 12327120.

The previous prime is 40072261. The next prime is 40072283. The reversal of 40072266 is 66227004.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40072261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6931 + ... + 11321.

It is an arithmetic number, because the mean of its divisors is an integer number (2009340).

Almost surely, 2^40072266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40072266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48224160).

40072266 is an abundant number, since it is smaller than the sum of its proper divisors (56376054).

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

40072266 is a wasteful number, since it uses less digits than its factorization.

40072266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 40072266 is about 6330.2658711937. The cubic root of 40072266 is about 342.2010206330.

The spelling of 40072266 in words is "forty million, seventy-two thousand, two hundred sixty-six".