40279392 has 144 divisors (see below), whose sum is σ = 127960560. Its totient is φ = 11943936.

The previous prime is 40279381. The next prime is 40279397. The reversal of 40279392 is 29397204.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40279397) 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, 92808 + ... + 93240.

It is an arithmetic number, because the mean of its divisors is an integer number (888615).

Almost surely, 2^40279392 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 40279392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63980280).

40279392 is an abundant number, since it is smaller than the sum of its proper divisors (87681168).

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

40279392 is a wasteful number, since it uses less digits than its factorization.

40279392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40279392 is about 6346.6047616029. The cubic root of 40279392 is about 342.7895985991.

The spelling of 40279392 in words is "forty million, two hundred seventy-nine thousand, three hundred ninety-two".